[HN Gopher] High-power microwave defeats drone swarm
       ___________________________________________________________________
        
       High-power microwave defeats drone swarm
        
       Author : nis0s
       Score  : 201 points
       Date   : 2025-09-27 22:25 UTC (1 days ago)
        
 (HTM) web link (www.epirusinc.com)
 (TXT) w3m dump (www.epirusinc.com)
        
       | miketery wrote:
       | This article is sparse on details.
       | 
       | How much energy, how long is the pulse, how close were the
       | drones?
       | 
       | Regardless I think the primary challenge with these systems will
       | be energy on site and a surge of it during waves of attacks.
       | Charged up capacitors can only handle so many waves.
        
         | WastedCucumber wrote:
         | I was wondering the same thing, but haven't found much. Sounds
         | like it's only ever been a mobile installation - on a trailer,
         | stryker, and a ship. Except for the ship, that probably means a
         | relatively limited power supply. And its limited range probably
         | means that stationary installations don't make much sense.
         | 
         | Sure seems like NATO would love to get a hold of some of these.
        
         | giantg2 wrote:
         | Potentially collateral damage too. You zapped some drones 100
         | yards away, but what about that airplane a couple miles out?
        
           | JumpCrisscross wrote:
           | > _what about that airplane a couple miles out?_
           | 
           | Are these Masars? If not, square cubed to the rescue.
        
             | hwillis wrote:
             | Lasers and masers are not inherently collimated or straight
             | lines. The _only_ thing specific to lasers /masers is that
             | all the light is the same wavelength. Beam, parabolic and
             | phased antennas are all very capable of making much tighter
             | beams than your average laser.
             | 
             | In fact at the limits of performance lasers (and
             | particularly masers) are quite _bad_ at generating straight
             | beams, because they are quite small sources of light and
             | divergence is inversely proportional to the width of the
             | emitter. It is a misconception that they are low-etendue.
        
               | mitthrowaway2 wrote:
               | Lasers are coherent emitters, which means that they
               | behave like a perfect point source and the beam forming
               | is limited only by diffraction. The collimation is
               | limited only by the lens diameter and quality.
        
             | giantg2 wrote:
             | I assumed they would be masers or at least something with
             | high directional gain. Otherwise your zapping a bunch of
             | other stuff. Someone else said it's only a 2km range.
        
           | hwillis wrote:
           | Cruising altitude is ~40k feet or 12 km and the range of the
           | weapon is 2km. The system only works because of all the
           | exposed wiring on quadcopters; everything in a plane is
           | enclosed in a highly conductive aluminum shell and is very
           | well protected. The windows are large enough to let in
           | microwaves, but not very well. Some antennas might be in
           | danger but in general planes are built to survive _lighting._
           | It would be a real freak accident for something to break.
        
             | giantg2 wrote:
             | I'd be more concerned about small planes or other drones.
             | But if a little shielding fixes it, then this will quickly
             | be obsolete as it's trivial to dd shielding if you're a
             | malicious actor.
        
           | bigiain wrote:
           | And also - what about the payload that drone was delivering,
           | aimed at the target and doing 150kmh or more when your
           | microwaves zapped it and killed off all the electronics.
           | It'll only take it 2 unpowered/unguided seconds to cover that
           | last 100m, so it'll have dropped 20m on a ballistic
           | trajectory. It won't have hit your tank right in the crew
           | hatch, but it's still delivered its explosive way too close
           | for comfort. Perhaps not a problem if the target is an
           | armored vehicle, but it'll probably still set your ammunition
           | store or fuel dump on fire.
        
         | hwillis wrote:
         | > How much energy, how long is the pulse, how close were the
         | drones?
         | 
         | 1 millisecond pulses and 70 kW continuous usage[1] which is
         | roughly equivalent to the AN/TPQ-53[2]. 2 km range.
         | 
         | > Regardless I think the primary challenge with these systems
         | will be energy on site and a surge of it during waves of
         | attacks. Charged up capacitors can only handle so many waves.
         | 
         | That is not how this kind of thing works. Capacitors are a
         | terrible energy source. Their voltage drops off exponentially
         | as they discharge and almost all electronic are very particular
         | about the voltage they require. A railgun wants current and
         | does not care about voltage. Radio transmitters care a _lot_
         | about voltage.
         | 
         | Regardless, a 70 kW generator fits on a small trailer. Smaller
         | than the weapon itself. It will run for days on a good sized
         | tank of diesel.
         | 
         | [1] https://www.twz.com/land/army-puts-50m-bet-on-next-gen-
         | leoni...
         | 
         | [2]
         | https://en.wikipedia.org/wiki/AN/TPQ-53_Quick_Reaction_Capab...
        
           | bigiain wrote:
           | > Capacitors are a terrible energy source.
           | 
           | They're a pretty good way of storing energy in a way you can
           | deliver it _really really_ fast. Sure, not in a way your
           | carefully designed electronic circuits can make use of it,
           | but if you need a really really big ZAP! capacitors are a
           | reasonable option. After all, clouds and dirt are not the
           | most efficient choice for capacitor plates, and air is not an
           | ideal dielectric, but lightning goes ZAP! quite satisfyingly.
           | 
           | As I posted elsewhere here,you might enjoy Lightning On
           | Demand's Lorentz Cannon: https://www.youtube.com/watch?v=lix-
           | vr_AF38
        
           | topspin wrote:
           | > Regardless, a 70 kW generator fits on a small trailer.
           | Smaller than the weapon itself. It will run for days on a
           | good sized tank of diesel.
           | 
           | At full load and a thermodynamic efficiency of about ~31% a
           | 70kW generator is about 300hp mechanical. Those fit on a
           | trailer. Not a "small" trailer. A dual axle type trailer with
           | ~1.3 tons of capacity (Cummings C70D2RE.) Military generators
           | tend to be heavier than commercial units. It will burn about
           | ~175 gal/day of diesel, so yes a "good sized" tank about:
           | about ~3.2 55 gal drums every day.
           | 
           | Now, they're imagining "625 element" systems for adequate
           | coverage of a high value site, like an air base. About 2000
           | bbl/day. That's a little more than 10 large tanker trucks of
           | fuel.
           | 
           | Logistically non-trivial. The Russian's have learned that
           | large fuel trucks are short-lived in drone-dense
           | environments.
           | 
           | Of course, that all for 100% 24/7 operation. I suspect that
           | any real system will quickly become adept at running far less
           | than 100%.
        
       | aurizon wrote:
       | A faraday foil layer will save electronics and shielded cable
       | runs will block air induced pulses. Wired motor coils will
       | tolerate, and fiber optic are immune. You can even control via IR
       | data using a bidirectional LED with a faraday copper window
       | screen protecting the electronics. The police use a microwave car
       | stopper that uses pulsed EMI. Just new armor = new chinks = the
       | race continues.
        
         | nomel wrote:
         | They make conductive spray paint for this sort of thing [1], so
         | it can be applied to the inside cover of electronics. Usual use
         | is targeted application for EMI suppression.
         | 
         | You'll sometimes find a squirt this on the inside of consumer
         | electronics, for a quick radiated emissions compliance fix.
         | 
         | [1]
         | https://www.amazon.com/stores/MGChemicals/page/0ADAC495-496D...
        
           | Terr_ wrote:
           | This feels like a weird counterpart to the can of plasti-dip
           | spray in my garage.
           | 
           | Combine those with the more-common juxtaposition of WD-40
           | versus duct-tape, and one can probably summon something
           | eldritch.
        
         | inetknght wrote:
         | > _You can even control via IR data using_
         | 
         | You can... once.
         | 
         | But that IR transmitter will be easily detected and destroyed.
        
       | startupsfail wrote:
       | There was a nice video, I've seen at some point where a "DJI
       | Phantom 3 drone gets hit with an electrical impulse of 1.4MV -
       | basically, a lightning strike."
       | 
       | And at the end, they were able to protect the drone, with a tiny
       | bit of shielding...
       | 
       | https://www.youtube.com/watch?v=L3iJjrQmEho
        
         | password4321 wrote:
         | > _they were able to protect the drone, with a tiny bit of
         | shielding_
         | 
         | That's not what happened in the video! Per the comments:
         | 
         | "I was really hoping the conductive tape lightning rod was
         | going to work, but no."
        
         | bigiain wrote:
         | A gutted microwave oven and a satellite tv dish have been
         | demonstrated to disable DJI drones at ranges exceeding 500m -
         | either having them fall out of he sky or trigger return to
         | home. That's broadband jamming on the 2.4GHz radio frequencies
         | though, not sending enough energy to screw with electronic
         | (apart from the sensitive radio receiver frontends).
         | 
         | (This was original DJI Phantom era, so maybe 10 years or so
         | back. I'm not aware of results of similar testing against newer
         | DJI gear, but I doubt it'd be much different, at least for
         | consumer DJI stuff.)
        
       | decker wrote:
       | The starting cost for a drone show is around $20k USD, so it
       | wouldn't be hard to fake what they are doing. It's hard to say if
       | this a functioning system that can take down drone swarms, or
       | someone is testing the market for a system that can.
        
         | g-mork wrote:
         | That seems a lot more complicated than simply using cheap
         | unshielded drones against an ineffective weapon, but I guess
         | it's possible
        
         | sheepscreek wrote:
         | They're selling defence equipment to countries, it wouldn't
         | help their cause if this is just smoke and mirrors. It either
         | works or it doesn't.
        
           | bdcravens wrote:
           | Hasn't stopped Boeing
        
             | leoh wrote:
             | I'm intrigued. Elaborate?
        
             | sheepscreek wrote:
             | If you read the entire article, you'll find a mention of an
             | audience member pointing at a drone. Remarkably, the
             | device/weapon was able to precisely bring that drone down
             | without affecting any of the nearby drones. Clearly, they
             | have something working for them. I can only imagine that it
             | would be significantly more challenging than simply
             | throwing a very wide EMP. Controlling an EMP is the
             | seemingly impossible task, and they managed to succeed.
        
               | stavros wrote:
               | To be fair, they'd be able to do that even more easily
               | with a drone show (ie remotely controlled drones).
        
               | adrian_b wrote:
               | This is not EMP.
               | 
               | It is just a high-power microwave transmitter, made with
               | gallium nitride field-effect transistors.
               | 
               | Like any microwave transmitter, it can use a directional
               | antenna. If the antenna is big enough, it can have a
               | narrow enough transmitted microwave beacon to intercept
               | only a single drone.
               | 
               | The GaN FETs enable a higher transmitter power at
               | whatever high frequency they are using. At lower
               | frequencies, a 70-kW power was already easily achievable
               | in the past. The higher frequency allows a precise aiming
               | of the microwave beacon with an antenna of reasonable
               | size.
        
           | hermitcrab wrote:
           | Really. A British fraudster managed to sell $20 golf ball
           | finders as bomb detectors for thousands of dollars each to
           | various militarys. He got away with it for quite a while.
           | 
           | https://www.bbc.co.uk/news/uk-29459896
        
       | siliconc0w wrote:
       | It's a cool demo but I'm pretty sure if this become widely
       | deployed, enemies would just start to wrap drones in copper tape
       | or something to make this far less effective.
        
       | ChuckMcM wrote:
       | It's the real deal, lots of challenges with high emf. Not
       | surprisingly a very common failure mode is that if you induce
       | currents in the coils of the brushless motors their controllers
       | which are using back emf to set their waveform phase get it wrong
       | and the motors stop spinning, spin backwards, and sometimes just
       | go back and forth like tiny washing machine motors.
       | 
       | Shielding helps of course, adds expense and adds weight, the two
       | things that cut into how many you can make for $X and how far
       | they can fly.
       | 
       | Counter drone systems in battle are going to be a thing, things
       | like the Danish 'bird' RADAR sees them easily enough[1],
       | targeting them with EMF just needs an antenna, generator, and
       | some clever electronics.
       | 
       | This becomes more important as the drones become more autonomous
       | because if there is no operator to 'jam', electronic counter
       | measures are not as effective.
       | 
       | [1] https://www.weibelradars.com/drone-detection/
        
         | hwillis wrote:
         | > Not surprisingly a very common failure mode is that if you
         | induce currents in the coils of the brushless motors
         | 
         | No, that doesn't happen. Currents can be induced in the wires
         | _to_ the motors, but not in the motors themselves. For one
         | thing, the outside surface of the motors is the aluminum rotor
         | which is an _extremely_ effective faraday cage. For another,
         | coils don 't act like antennas. Loops of wire in an electric
         | field have the exact same voltage difference as a straight
         | wire.
         | 
         | > Shielding helps of course, adds expense and adds weight, the
         | two things that cut into how many you can make for $X and how
         | far they can fly.
         | 
         | Shielding adds virtually zero weight; carrying a spool of fiber
         | optic cable adds a lot of weight. All the drones in Ukraine
         | right now are fiber optic but most of them are unshielded...
         | the reason why is not that shielding is heavy, it's just that
         | there are lots of jammers but very few truck-sized weapons
         | intended to totally disable drones.
         | 
         | That's also assuming it would even _work_ on a drone without an
         | antenna. If these weapons are not relatively broad-spectrum
         | then they will be very sensitive to the particulars of the
         | circuitry, and they won 't always work.
        
           | gamblor956 wrote:
           | _For another, coils don 't act like antennas_
           | 
           | Coiled antennas are fairly common and have been around since
           | at least the 1960s...
        
             | sudosysgen wrote:
             | But typically with a much smaller number of turns. A motor
             | coil should have a decently high inductance and thus act as
             | an antenna only for pretty low frequencies.
        
               | adrian_b wrote:
               | Coil antennas can have thousands of turns.
               | 
               | It is not the number of turns that matters to distinguish
               | coil antennas from motors, though indeed a high number of
               | turns in both motors and antennas leads to a high
               | inductance, which ensures that any resonance frequencies
               | will be low, so a received radio signal of high frequency
               | will not be amplified by a resonance.
               | 
               | The magnetic circuit of a coil antenna has a very big air
               | gap, because its ferromagnetic core usually has the form
               | of a cylinder or of a prism and the magnetic circuit
               | closes through the air between the opposite ends of the
               | core.
               | 
               | The magnetic circuit of a motor has only small air gaps
               | between stator and rotor, which are required to allow the
               | rotor movements. Because of the small air gaps, the
               | inductance of a motor winding is much higher than the
               | inductance of a coil antenna with the same number of
               | turns and using a ferromagnetic core made of the same
               | material.
        
           | adrian_b wrote:
           | Currents can be perfectly well induced in the motors
           | themselves, by the variable magnetic field of an
           | electromagnetic wave.
           | 
           | Any electromagnetic wave has both an electric field _and_ a
           | magnetic field, hence its name.
           | 
           | An antenna can be made from either a straight wire sensitive
           | to the electric field _or_ from a loop of wire sensitive to
           | the magnetic field.
           | 
           | The only reasons why a motor is usually a bad antenna is that
           | it should have a case with good shielding properties (i.e.
           | the magnetic circuits have only small gaps) and the high
           | inductances of its windings act as low-pass filters for high-
           | frequency induced currents, like those of a microwave
           | transmitter.
           | 
           | There exist electric motors with very low inertia of the
           | moving parts (to enable high accelerations), where the rotor
           | does not have any ferromagnetic material and the stator has
           | large gaps for the rotor. Such motors can be much more
           | efficient antennas than standard motors, but such motors are
           | not used in drones.
           | 
           | All the cheap radios for under 30 MHz signals used antennas
           | made of a ferrite bar with a coil on it, very similar to a
           | motor winding, except that the magnetic circuit had a much
           | greater gap than in a motor, because they were more sensitive
           | at small sizes than antennas sensitive to the electric field.
           | 
           | Moreover, brushless motors do not have an aluminum rotor. You
           | are thinking about AC induction motors. Induction motors do
           | not have brushes, but nobody calls them brushless, because
           | they never had brushes. Only DC motors are called brushless,
           | because their classic variant had brushes, which are replaced
           | by power transistors in brushless motors.
           | 
           | The aluminum rotor of induction motors is normally inside,
           | not outside. The inverted construction is rare.
           | 
           | Both induction motors and brushless motors have windings only
           | on the stator, which is the external part in the normal motor
           | structure, and those are equally susceptible to variable
           | magnetic fields, except that they are usually bad antennas
           | for the reasons mentioned above, especially at microwave
           | frequencies.
           | 
           | In an ideal motor, the stator is not an electrical conductor
           | (which is actually the case for ferrite stators), so it has
           | no shielding properties for electric fields, but it has
           | shielding properties for the magnetic field, if the gaps in
           | its magnetic circuit are small.
        
             | bri3d wrote:
             | Almost all quadcopter brushless motors are constructed as
             | "outrunners," with a fairly thick, sturdy aluminum motor
             | bell (rotor!) with strong permanent magnets glued inside of
             | it and the stator in the center. I agree that they are not
             | immune to RF but at high frequencies it will require a
             | really comical amount of power to do anything to one.
        
           | varjag wrote:
           | Oh it will absolutely work on a drone without antenna: in
           | microwave range every PCB trace becomes an antenna. If the
           | field is strong enough it'll just blow the gates on IC
           | inputs. If it's far away it can still do soft upset of any
           | periodic signal, e.g. one of the numerous clocks on digital
           | circuits.
        
         | checker659 wrote:
         | So, we could do the same with robots? Like autonomous killer
         | humanoids?
        
           | MountDoom wrote:
           | Electronics is electronics. But the weight trade-offs for
           | anything that walks or drives on the ground aren't as severe
           | as for drones, so you could presumably provide EM shielding
           | and light armor more easily.
           | 
           | At the same time, terrain is just harder and slower to
           | navigate, it's easier to erect barriers, and humans are
           | better at spotting eye-level threats. There's a reason why
           | murder-drones are common on the battlefield, and murder-
           | humanoids aren't.
        
             | DonHopkins wrote:
             | Murder Turtles, however...
             | 
             | https://dl.acm.org/doi/10.1145/1056602.1056608
             | 
             | https://donhopkins.com/home/TurtlesAndDefense.pdf
             | 
             | >TURTLES AND DEFENSE
             | 
             | >Introduction
             | 
             | >At Terrapin, we feel that our two main products, the
             | Terrapin Turtle (r), and the Terrapin Logo Language for the
             | Apple II, bring together the fields of robotics and AI to
             | provide hours of entertainment for the whole family. We are
             | sure that an enlightened application of our products can
             | uniquely impact the electronic battlefield of the future.
             | [...]
             | 
             | >Guidance
             | 
             | >The Terrapin Turtle (r), like many missile systems in use
             | today, is wire-guided. It has the wire-guided missile's
             | robustness with respect to ECM, and, unlike beam-riding
             | missiles, or most active-homing systems, it has no radar
             | signature to invite enemy missiles to home in on it or its
             | launch platform. However, the Turtle does not suffer from
             | that bugaboo of wire-guided missiles, i.e., the lack of a
             | fire-and-forget capability.
             | 
             | >Often ground troops are reluctant to use wire-guided
             | antitank weapons because of the need for line-of-sight
             | contact with the target until interception is accomplished.
             | The Turtle requires no such human guidance; once the
             | computer controlling it has been programmed, the Turtle
             | performs its mission without the need of human
             | intervention. Ground troops are left free to scramble for
             | cover. [...]
             | 
             | >Because the Terrapin Turtle (r) is computer-controlled,
             | military data processing technicians can write arbitrarily
             | baroque programs that will cause it to do pretty much
             | unpredictable things. Even if an enemy had access to the
             | programs that guided a Turtle Task Team (r) , it is quite
             | likely that they would find them impossible to understand,
             | especially if they were written in ADA. In addition, with
             | judicious use of the Turtle's touch sensors, one could,
             | theoretically, program a large group of turtles to simulate
             | Brownian motion. The enemy would hardly attempt to predict
             | the paths of some 10,000 turtles bumping into each other
             | more or less randomly on their way to performing their
             | mission. Furthermore, we believe that the spectacle would
             | have a demoralizing effect on enemy ground troops. [...]
             | 
             | >Munitions
             | 
             | >The Terrapin Turtle (r) does not currently incorporate any
             | munitions, but even civilian versions have a downward-
             | defense capability. The Turtle can be programmed to attempt
             | to run over enemy forces on recognizing them, and by
             | raising and lowering its pen at about 10 cycles per second,
             | puncture them to death.
             | 
             | >Turtles can easily be programmed to push objects in a
             | preferred direction. Given this capability, one can easily
             | envision a Turtle discreetly nudging a hand grenade into an
             | enemy camp, and then accelerating quickly away. With the
             | development of ever smaller fission devices, it does not
             | seem unlikely that the Turtle could be used for delivery of
             | tactical nuclear weapons. [...]
        
               | ChuckMcM wrote:
               | And with the right shape, the turtles would bin pack when
               | falling into a ditch and with enough turtles they would
               | make their own bridge for the turtles that came behind
               | :-)
        
               | DonHopkins wrote:
               | It's turtles all the way down!
               | 
               | Or all the way up. Yertle the Turtle represented Hitler,
               | and now Trump and Putin.
               | 
               | https://en.wikipedia.org/wiki/Yertle_the_Turtle_and_Other
               | _St...
               | 
               | >Seuss has stated that the titular character Yertle
               | represented Adolf Hitler, with Yertle's despotic rule of
               | the pond and takeover of the surrounding area parallel to
               | Hitler's regime in Germany and invasion of various parts
               | of Europe.[3][4] Though Seuss made a point of not
               | beginning the writing of his stories with a moral in
               | mind, stating that "kids can see a moral coming a mile
               | off", he was not against writing about issues; he said
               | "there's an inherent moral in any story" and remarked
               | that he was "subversive as hell".[5][6] "Yertle the
               | Turtle" has variously been described as "autocratic rule
               | overturned",[7] "a reaction against the fascism of World
               | War II",[8] and "subversive of authoritarian rule".[9]
               | 
               | When Dr. Seuss Made Hitler Into a Turtle: A reading of
               | Dr. Seuss's "Yertle the Turtle" with a bit of history in
               | mind.
               | 
               | https://benkageyama.medium.com/when-dr-seuss-made-hitler-
               | int...
        
         | bob1029 wrote:
         | Shielding only takes you so far. Somewhere around 10kV/m field
         | strength the energy _will_ find a weakness no matter how well
         | designed the protection is.
         | 
         | The longer pulses the in this platform seem to be a big part of
         | delivering effect on target. Area under the curve is where the
         | damage happens.
        
           | varjag wrote:
           | IIRC NEMP is assumed to be at 50kV/m for milspec
           | certification purposes. However most exposed devices are much
           | simpler than quadcopters. There are some class exemptions
           | too, e.g. electronic sights are allowed a fraction of second
           | blackout after upset. Not something that would work for an
           | attack drone though.
           | 
           | What I think makes Leonidas more efficient is they likely
           | operate in continuous wave bursts rather than pulses.
           | Probably with a broad comb rather than one specific value
           | too.
        
             | hnaccount_rng wrote:
             | I don't think a fraction of a second interruption would be
             | overly problematic. These drones are somewhat heavy and
             | thus bring relevant amounts of momentum. But the start up
             | process is probably far too long
        
               | varjag wrote:
               | Yes the reboot takes too long, even before you account
               | the time to re-negotiate comms (even over fiber it is not
               | instant). However in a terminal approach on target say a
               | 1/4 second disrupt will likely be unrecoverable.
               | Quadcopter drones are not ballistic or aerodynamic, and
               | stability recovery once it gets tumbling is challenging.
        
       | Synaesthesia wrote:
       | I wonder if this will work with fibre-optic drones.
        
         | anonymousiam wrote:
         | Anything with a power supply and a radio receiver has some
         | susceptibility.
        
           | schiffern wrote:
           | No radio on fiber drones, but anything electronic is
           | effected. Truly effective shielding gets heavy, and cuts the
           | payload and range significantly.
        
         | ra wrote:
         | yes because it attacks the coils in the motors.
        
         | Joel_Mckay wrote:
         | Probably would work once or twice, and then some kid will
         | notice copper foil tape makes great Faraday shields. Hams
         | already do this cage technique all the time to help lower the
         | noise floor on cheap equipment.
         | 
         | Probably better off with #12 or #9 bird shot shells, or a cool
         | pet falcon named Xavier. =3
        
       | daniel_iversen wrote:
       | Drone defence (detection and neutralisation) has to move fast
       | because it's quite asymmetric warfare (i.e drone worth $4K and
       | take out a tank worth $30m) - over the last week for many nights
       | Denmark's airports and military installations has had drones
       | disrupt air traffic and cause a lot of angst in the population
       | and they were completely not prepared, haven't wanted to shoot
       | them down, and they don't know where they're coming from or where
       | they're going - scary that they're caught so much on the back
       | foot
       | 
       | https://www.abc.net.au/news/2025-09-25/denmark-defence-minis...
        
         | Mistletoe wrote:
         | Why don't they want to shoot them down?
        
           | StanislavPetrov wrote:
           | Shooting at flying things in densely populated areas is
           | generally a bad idea because when you miss, whatever
           | ammunition you used falls on somebody on the ground. And if
           | you hit, the debris falls on someone on the ground.
        
             | drysine wrote:
             | >when you miss, whatever ammunition you used falls on
             | somebody on the ground
             | 
             | No problem, you just say that Russians deliberately target
             | civilians.
        
               | animuchan wrote:
               | This poses a fun dilemma: the belief that Russia
               | deliberately targets civilians (which is likely correct)
               | almost requires us to also believe that the Russian army
               | fields precision weaponry allowing deliberately targeting
               | things (of which the evidence is scarce).
        
               | drysine wrote:
               | >which is likely correct
               | 
               | Why do you think that?
               | 
               | >almost requires us to also believe
               | 
               | That's easy. Russia deliberately targets civilians, but
               | being totally inept, misses and hits different civilians.
               | 
               | >of which the evidence is scarce
               | 
               | Is it?
               | 
               | Have a look at this one, where Russia hit Ukrainian
               | MLRSes in a night strike.[0] Western media reported that
               | as inhuman and savage Russians destroying a shopping
               | mall.[1] The mall indeed suffered but only because the
               | Ukrainians parked MLRSes next to it. Ironically the
               | Ukraine itself provided the evidence of that by
               | distributing video where they talk about the mall but
               | incidentally show destroyed MLRS (the other one got
               | evaporated).[2]
               | 
               | [0] https://t.me/aleksandr_skif/3150
               | 
               | [1]
               | https://www.nytimes.com/2024/04/06/world/europe/russia-
               | ukrai...
               | 
               | [2] https://t.me/ASupersharij/28133
        
               | animuchan wrote:
               | Point taken, thanks!
               | 
               | Re: Russia deliberately targets civilians, but being
               | totally inept, misses and hits different civilians. --
               | Yep, absolutely, but this is unfalsifiable I guess. I
               | mean, maybe they're targeting hostile aliens from space,
               | but being inept, [...]
               | 
               | Re: Why do you think that? -- I extrapolate from Putin's
               | allies really. Hamas specifically (and very vocally /
               | proudly) targets civilians, Hezbollah targets civilians,
               | Iran and Houthis routinely fire ballistic missiles at
               | residential areas. (I'm only listing things I've actually
               | witnessed, as a noncombatant.)
               | 
               | So intuitively they're all in the same bucket. I'll be
               | happy to be completely wrong about Russia in this regard.
        
               | tim333 wrote:
               | There's this, though with a drone
               | https://www.hrw.org/news/2025/06/17/russia-uses-drones-
               | to-ta...
        
               | drysine wrote:
               | Here is one of the top Ukrainian propagandists posting in
               | his personal channel a video from Belgorod (Russia) that
               | shows wounded Russian women screaming and thrashing in
               | agony (the text reads "Happy New Year, bitches") after
               | Ukrainian MLRS strike at the city:
               | https://t.me/dmytrogordon_official/39688
               | 
               | Here is the Ukraine targeting the same high-rise
               | apartment building in Kazan with multiple drones:
               | https://t.me/readovkanews/91042
               | 
               | Here is the Ukraine blowing a bridge in Russia exactly
               | when a passenger train was passing under it leading to
               | deaths of civilians including children:
               | https://www.theguardian.com/world/2025/jun/01/deaths-as-
               | russ...
               | 
               | Here are a paramedic and an ambulance driver murdered by
               | Ukrainian drone near Sudzha (Kurskaya oblast):
               | https://t.me/readovkanews/85353
               | 
               | I could go on and on.
               | 
               | Which conclusions do you draw from that about the current
               | Ukrainian regime or Ukrainian nationalists?
        
               | tim333 wrote:
               | I'd say it's a fine example of whataboutism in an
               | argument. The fact that other people in history have
               | committed atrocities does not mean it's hunky dory to
               | Russia to murder people.
        
               | drysine wrote:
               | >that other people in history
               | 
               | What? It's atrocities that are being committed right now
               | by the Ukraine. Do they mean that "Ukraine deliberately
               | targets Russian civilians"?
        
               | drysine wrote:
               | >I extrapolate from Putin's allies really. ... they're
               | all in the same bucket
               | 
               | Hamas, Hezbolla or Houthis are hardly Russian allies.
               | Iran isn't fighting on the Russian side like North Korea
               | did, but I guess you can call them an ally of sorts.
               | 
               | Here is a bit about Israel, which supports the Ukraine:
               | Two of the sources told the outlets that in the first few
               | weeks of the war, the IDF allowed up to 15 or 20 civilian
               | deaths for every low-ranking Hamas militant assassinated.
               | That number could increase to up to more than 100
               | civilians if the IDF were targeting a single senior Hamas
               | official, the sources said.             "There was a
               | completely permissive policy regarding the casualties of
               | operations," one source said, according to the report. "A
               | policy so permissive that in my opinion it had an element
               | of revenge." [0]
               | 
               | Assuming that's true, should we extrapolate that too?
               | 
               | [0] https://www.businessinsider.com/israelis-military-
               | idf-civili...
        
             | beeflet wrote:
             | does it apply to birdshot? The solution is many small
             | projectiles with great drag to mass ratio
        
               | doikor wrote:
               | If you fly the drone 100m up in the air it will block
               | commercial flying due to risk of collision but birdshot
               | can't reach it.
               | 
               | Even if you manage to hit it at that range there just
               | isn't enough kinetic power left to really do any damage.
               | 
               | For example here is a Finnish journalist being shot at
               | 70m with birdshot. https://youtu.be/WJgzzrcSmNM?t=124
               | note that the shot did hit them but none managed to go
               | trough the cardboard and normal civilian clothes were
               | enough protection for other parts of the body.
               | 
               | Basically outside of drones that are trying to hit you
               | (suicide fpv drones) birdshot is kinda useless as there
               | isn't really any reason to fly them so close that they
               | would be in effective range.
        
               | XorNot wrote:
               | The other thing is even if birdshot works...the drone is
               | likely to fall down relatively intact where again - it
               | might hit someone.
        
               | nick49488171 wrote:
               | Lest anyone misinterpret your statement, shotguns are
               | still dangerous at long range: No. 7 1/2 shot carries,
               | and is dangerous to humans, for 125 yards; No. 6 shot is
               | dangerous for 250 yards; 3 and 4 shot are dangerous for
               | 300 yards and BB shot is dangerous for 450 yards. The
               | heavy shot used for geese is dangerous for 1,400 yards --
               | almost a mile.
               | 
               | The spread will mean you likely won't hit what you are
               | aiming at, but it is still dangerous.
        
           | Analemma_ wrote:
           | Bullets are spin-stabilized: if you shoot at something in the
           | air and miss, the bullet will generally still be lethal when
           | it eventually returns to the ground. That's a no-no in
           | densely populated areas.
        
             | Beijinger wrote:
             | ?
             | 
             | You would not be able to hit a drone with a bullet.
             | Statistics are against you.
             | 
             | You use fancy AHEAD ammunition that disintegrates, and
             | hopefully the drone with it.
             | 
             | https://en.wikipedia.org/wiki/AHEAD_ammunition
             | 
             | Yet, the bursts fired are expensive as fuck. Much more
             | expensive than the drone.
             | 
             | Here you go: https://www.youtube.com/watch?v=bdwjcayPuag
        
               | joecool1029 wrote:
               | Can't some kind of shot shell get used that just throws
               | pellets in the direction? Shorter effective range but way
               | better chance of hitting the drone. Also, comparatively
               | cheap.
               | 
               | What you linked seems like it would only be needed for an
               | armored drone?
        
               | Beijinger wrote:
               | This system has a range up to 5 km. Shotguns shells are
               | sometimes effective, often not. There are enough videos
               | of, mostly Russians, trying to shoot them down with a
               | shotgun.
               | 
               | This AHDEA ammunition, while expensive, will bring down
               | not only a drone, airplane or chopper, but also artillery
               | grenades.
        
               | bigiain wrote:
               | I'm fairly certain clay pigeon shooting type ammunition
               | and aiming skills stand reasonable chances of hitting
               | even small drones and doing sufficient damage to knock
               | then out of the sky, but only at maybe 50m or so range. A
               | typical attack drone like the types used in Ukraine right
               | now are probably capable doing well over 30m/s on final
               | approach, so it'd be a tough interception still, only
               | about a one second window to get your shot off before
               | it's likely to deliver it's payload ballistically even if
               | you have scored a direct hit.
               | 
               | I suspect the same sort of skills displayed in Ukraine
               | building home made Ardupilot based drones with optical
               | final stage guidance could also be turned to building
               | multi barrel "Phalanx-style" shotgun setups on manual
               | plus computer-optical assisted aiming, in a form factor
               | compact enough to be installed in the back of a Hilux.
               | And that'd be very much the sort of mostly Commercial Off
               | The Shelf approach that seems to do so well tipping the
               | asymmetric warfare in Ukraine's favour in this war.
        
               | jandrewrogers wrote:
               | No, the range is far too short. Hitting a moving target
               | with normal bullets is not particularly difficult but you
               | have to consider where those bullets land. Hence why many
               | guns designed for this purpose use larger ammo capable of
               | self-destructing if they don't hit the target.
        
               | foota wrote:
               | I'm fairly certain they're shotting down drones with
               | bullets in Ukraine. See for instance:
               | https://www.youtube.com/watch?v=AkkdWu7Xt7o
        
               | EdwardDiego wrote:
               | Sure, and for those reasons of probability of a
               | successful hit, hunters don't tend to shoot birds on the
               | wing with rifles either. I mean it's doable, but it's a
               | very hard shot to land with a MK-1 Eyeball.
               | 
               | But we've seen infantry effectively using shotguns in
               | Ukraine as a defensive weapon against drones for the same
               | reason hunters use shotguns to shoot birds on the wing,
               | within your weapon's range the odds of a disabling hit
               | are pretty high if you're trained.
               | 
               | So not sure why it has to be either a rifle bullet _or_ a
               | massively overengineered defense contractor's very
               | expensive super-duper-shotgun round.
               | 
               | Haha, wait, it's flak guns again, just redone for the
               | 21st century. Ah bless.
               | 
               | If the choice is restricted by stand-off range, that is a
               | different kettle of fish, maybe do bring back the, once
               | considered entirely obsoleted by high altitude aircraft
               | and missiles flak.
               | 
               | But in the here and now, regular shotguns are being used
               | defensively, with a certain level of success, by infantry
               | against drones in Ukraine.
        
               | Beijinger wrote:
               | Based on random videos I have seen, it seems pretty
               | difficult to shot down a drone with a shotgun. Sure,
               | better than nothing, probably your best bet at that
               | point.
        
               | baxuz wrote:
               | Rheinmetall's Skynex system costs an estimate of 4k EUR
               | per engagement.
        
             | apt-apt-apt-apt wrote:
             | Does the spin-stabilized part have any relevance here? It
             | doesn't have anything to do with the lethality of a falling
             | bullet.
        
               | jandrewrogers wrote:
               | Spin-stabilized bullets bleed their speed at a far slower
               | rate, greatly increasing average terminal velocity and
               | therefore lethality.
        
               | apt-apt-apt-apt wrote:
               | You're right- spin-stabilized bullets would have
               | significantly less drag, thus would travel much higher,
               | and thus come down with way more lethality. Honestly
               | though, unless someone's trying to shoot the drone with a
               | musket, all bullets are going to be stabilized somehow.
        
               | lstodd wrote:
               | Nope. Maybe the idea was that an unstabilized slug will
               | tumble and lose velocity quickly, after which it's just
               | some junk falling from above, mostly harmless.
        
       | nakamoto_damacy wrote:
       | Claims show it disabling many small, largely unhardened drones;
       | they do not prove it can defeat a properly shielded electronics
       | bay.
        
       | sleepyguy wrote:
       | This type of weapon reflects the West's approach to drone warfare
       | --multi-million-dollar pieces of equipment that will need to be
       | right on the front line to defend troops and positions. I'll tell
       | you right now, it would last about 10 minutes on the front lines
       | in Ukraine. What many people don't realize is the sheer volume of
       | drones being used in some of the battles along the front--it's
       | not hundreds, but thousands. Trenches are being abandoned, and
       | everyone is going underground. Ground drones can't even be sent
       | in to support front line troops anymore, as vehicles are taken
       | out within minutes. This is a weapon of last resort, to take out
       | what gets through to the rear. We need front line solutions which
       | don't exist yet.
       | 
       | Here is a quote from a piece a front line defender in the
       | Ukrainian Arm Forces wrote. His name is Maksym Zhorin
       | 
       | >Equally dangerous is the technological obsolescence of NATO
       | countries and their inability to counter modern threats. Adequacy
       | of response, means of combat, even simply understanding what real
       | war looks like today -- all of this is missing. Therefore, even a
       | few drones have become a problem for them.
       | 
       | I don't know what the solution to drones are because everything
       | is evolving in real time.
        
         | kjkjadksj wrote:
         | Hit their cheap drone with your cheap drone? Seems like mg
         | bullets are cheaper as well. Hook up an mg to a webcam with
         | motion tracking and stick it in a bush. Might not even need
         | sophisticated tracking with sufficient volume of fire.
        
         | rdtsc wrote:
         | Technologies are obsoleted at ridiculous rates during the war.
         | Anyone still remember how HIMARS was supposed to win the war?
         | Indeed it was absolutely fantastic at first, but everyone sort
         | of stopped talking about it. It turns out Russians zoomed in on
         | the weakest spot of these types of weapons - reliance on GPS.
         | As soon as they started jamming that, the effectiveness of a
         | whole slew of those types of weapons went way down. So now
         | there is a whole rush to create anti-jammable GPS technology.
         | 
         | Same thing with drones. They are a game changer but then
         | Russians figured out they can use drones too. Moreover, they
         | were the first ones to field fiber optic drones. Those things
         | are bonkers. As in, if someone told me "this defense company is
         | creating fiber optic drones" I could have bet it's a corruption
         | scheme as the idea just seems to implausible yet here it is,
         | now both sides use them.
        
           | jandrewrogers wrote:
           | In fairness, Ukraine received nerfed versions of most of that
           | tech from the US, increasing its susceptibility to things
           | like GPS jamming. A lot of it was downgraded to circa
           | 1980-1990s capability levels, which is still adequate for a
           | lot of the Soviet era tech Russia is using.
           | 
           | It would likely be a mistake to overfit what is happening in
           | the Ukraine to US capabilities.
        
         | t0mas88 wrote:
         | NATO needs to start working on more low-tech high volume
         | solutions.
         | 
         | The Netherlands and Germany used to have old anti-air systems
         | that were basically a tank undercarriage with a radar and two
         | rapid fire machine guns. It was a system from the 1960s.
         | Ineffective against fighter jets since those fly higher than
         | the range of the guns, but a modern version of this would be
         | cost effective against low tech drones.
         | 
         | You could build something like it using an existing armoured
         | personnel carrier, fast movable gun and a modern radar sensor.
         | It would be helpless against jets or tanks, but I think the way
         | to use it would be to have high-tech air defense systems shoot
         | the jets (with very expensive missiles) at long range and use
         | these glorified air guns to shoot the drones at much closer
         | range.
        
           | justsomehnguy wrote:
           | There is a reason why you won't find nor Shilka nor Tunguska
           | there.
        
       | imglorp wrote:
       | This seems like an ideal application of the electrolaser. This
       | was an ultraviolet laser that would ionize a channel through air
       | and then a high voltage pulse could be sent over that channel to
       | a target. Originally they were talking about this being like a
       | long range taser as a non-lethal stun weapon, but maybe more
       | suited for anti-drone technology.
       | 
       | I don't know why this didn't get realized in its original form.
       | Maybe there was a practical impediment.
       | 
       | https://en.m.wikipedia.org/wiki/Electrolaser
        
         | bigiain wrote:
         | You might enjoy Lightning On Demand's Lorentz Cannon:
         | https://www.youtube.com/watch?v=lix-vr_AF38
         | 
         | I does seem like a lot of stuff is needed. He's got 2 tons of
         | capacitors in a stack 20 feet tall to get around 35 feet of
         | range. He although he says:
         | 
         | "I was surprised at just how fast the plasma cannon range
         | scaled with increasing drive voltage and how much explosive
         | force the shock wave can deliver to target the data suggests
         | that a plasma cannon with just a 30t high Marx Tower could
         | achieve 1/4 mile range"
         | 
         | I know military contractors will have 3 or more orders of
         | magnitude more money to throw at their technology demos, but I
         | suspect there's some cold hard physics which shows it's totally
         | impractical to defend anything more then very small high value
         | targets with a system like that.
        
           | palmfacehn wrote:
           | They used a filament to guide their charge.
        
       | sudosysgen wrote:
       | Won't this be pretty easy to defend against with some shielding
       | and optocouplers? Doubly so for fiber optic drones.
        
       | henearkr wrote:
       | Would this be safe for e.g. birds?
        
         | bigiain wrote:
         | I'm pretty sure people with hostile drones inbound on a
         | battlefield aren't too worried about whether it's safe for
         | birds.
         | 
         | I'm not even sure that the people responsible for keeping
         | airports safe and open care too much either. But no doubt
         | there'll be pushback ranging from genuinely concerned anuimal
         | rights people, through to completely unhinged conspiracy
         | theorists. who make it difficult to build/test/deploy this sort
         | of thing in civilian contexts.
        
           | Sporktacular wrote:
           | "people with hostile drones inbound"
           | 
           | People under treat will justify all sorts of things. It's up
           | to everyone else to to balance whether their response is
           | reasonable.
        
         | beeflet wrote:
         | The microwaved birds should be completely safe to eat
        
       | lstodd wrote:
       | This looks like a repurposed AESA radar. What took them so long
       | then?
        
       | varenc wrote:
       | This fictionalized demo video from the company is entertaining:
       | https://vimeo.com/942125659/223b79c285
       | 
       | It's an over the top promotional video that feels like it's out
       | of movie. Must have cost them plenty to make it. It's like porn
       | for military gear.
       | 
       | Fascinating to me that making content like that presumably helps
       | them sell.
        
         | anal_reactor wrote:
         | Shit you can do when your target audience isn't "people in
         | general", which is #1 reason why modern ads are so bland and
         | boring. Also, I assume they're not trying to sell a specific
         | product here, but rather an idea that someone can later invest
         | in.
        
         | trcf22 wrote:
         | Not so different from matrix isn't? I've got no idea how it
         | works but does it also destroys all forms of electronics in the
         | area?
        
         | torginus wrote:
         | Because this is all what they have - a fictional dramatization
         | meant to impress layman decision makers into buying a
         | tremendously expensive system that'll never be viable.
         | 
         | This would've worked in a world with no major conflict where
         | the main enemy was a fictional one dreamed up by them to be
         | especially vulnerable to the sort of system they make but we
         | don't live in that world.
        
         | imtringued wrote:
         | You have to consider that they assume that the enemy uses the
         | standard online forum strategy of swarming the drones.
         | 
         | If you have enough drones for a swarm, you'd realize that
         | losing some of them to figure out the enemies' anti air defense
         | range would be a viable strategy, which means you'll stop
         | swarming them.
        
         | michelb wrote:
         | Also, will these swarms even be picked up by radar?
        
         | CommenterPerson wrote:
         | And the OP link reads like a PR news release.
        
       | nirui wrote:
       | Speak of microwave anti-drone weapons, YouTube channel Tech
       | Ingredients made one with microwave oven parts:
       | https://youtu.be/V6XdcWToy2c?t=1298
       | 
       | At 21:38 of the video (link above is timestampped), as the drone
       | got hit by the microwave, one side of it's motors
       | stopped/malfunctioned, which lead to asymmetric thrust, causing
       | the drone to flip and fall. But the drone itself seemed still
       | functional after the fall.
       | 
       | Not sure how much damage Epirus' Leonidas could cause. My opinion
       | is, if you want to anti-drone, you need to kill it fast, faraway
       | and complete. If the vehicle is not agile enough, the drones will
       | just go behind you. And if a drone can total a tank with ease,
       | that armored carrier vehicle will not survive much hits.
        
         | stavros wrote:
         | Generally, if a motor desyncs, you need to reboot the ESC. It's
         | very hard for the drone to take off again, though, as stuff on
         | the ground tends to tangle up in the motors.
        
         | imtringued wrote:
         | Actually, if you can capture the enemies' drones intact and
         | reprogram them, the enemy is fucked.
        
       | Reason077 wrote:
       | > _" Epirus has improved on previous iterations by using Gallium
       | Nitride (GaN) semiconductors to generate microwaves instead of
       | fragile, power-hungry magnetron vacuum tubes"_
       | 
       | Presumably this technology could also be used to make more
       | efficient and powerful microwave ovens. Have any consumer
       | appliance makers started using GaN semiconductors in their
       | microwaves?
        
         | nico_h wrote:
         | Probably not enough margin in microwaves ovens to justify
         | putting GaN stuff in it yet. Maybe for premium products. Bigger
         | volume! Silent operation! More efficient!
        
           | nick49488171 wrote:
           | Would it be silent? A lot of the noise sounds like
           | transformer noise which you would still get
        
             | snops wrote:
             | It would be operating off rectified DC (like an induction
             | hob) or using a SMPS operating at ultrasonic frequencies to
             | deliver a lower DC voltage, you wouldn't get the 50Hz buzz
             | even if there was a transformer.
        
         | WithinReason wrote:
         | It's in development:
         | https://www.digikey.com/Site/Global/Layouts/DownloadPdf.ashx...
         | 
         |  _Varying the phase between multiple antennae can enable the
         | field distribution inside the oven to be intelligently
         | controlled to achieve homogeneous cooking results. Furthermore,
         | by modifying the frequency and phase to match the food in the
         | oven, very high RF energy delivery efficiency can be attained -
         | above 90% even for small loads._
         | 
         |  _It has been demonstrated how a steak can be cooked on the
         | same plate as ice cream without it melting, showing the
         | precision of the directed RF energy. In practice, one gets
         | outstanding control over internal meat temperature, with a
         | tight tolerance of just one degree Celsius. Therefore, food can
         | be cooked automatically, and one simply specifies the steak
         | "doneness" level, for example, medium rare; and the oven will
         | measure the food's properties and calculate the required
         | settings. Without having to manually enter the power levels,
         | cooking is more predictable, and the interface more user-
         | friendly_
         | 
         | A consumer version is e.g. the Miele Dialog oven, costing $10K
        
       | Animats wrote:
       | Here we have the latest Ukrainian drones resistant to Russian
       | countermeasures.[1] There are Japanese drones able to not only
       | survive lightning strikes, but guide them.[2]
       | 
       | Because the Russia-Ukraine war is so active, drones that can
       | survive RF weapons can be expected essentially immediately.
       | Ukraine fields a new generation of drones every three months.
       | They have to.
       | 
       | [1] https://kyivindependent.com/ukraine-tests-new-kamikaze-
       | drone...
       | 
       | [2] https://dailygalaxy.com/2025/04/japan-has-successfully-
       | used-...
        
         | varjag wrote:
         | You're talking about comms jamming, which has been mostly
         | useless in Ukraine for some time now. Leonidas appears to use
         | directed EMI upset of digital circuits as a mechanism. No
         | existing quadcopter design is immune. And while designing an
         | immune drone is possible, it will be an entirely different cost
         | proposition.
        
           | devttyeu wrote:
           | Put sensitive electronics in a metal box, comms over a fiber
           | (already common), and you're good to go.
           | 
           | Only tricky thing is if currents induced in motors are too
           | hard to reject in driver circuitry, tho even at the extreme
           | this should be possible to insulate with capacitors (or
           | worse/heavier with transformers)
        
             | varjag wrote:
             | Sounds like a great plan if you don't need a camera,
             | positioning and magnetic compass. You also want your cage
             | grounded or very thick, otherwise with sufficiently strong
             | field it will become preemable.
        
               | pulse7 wrote:
               | You can put camera in transparent Faraday cage. With
               | camera and gyro one can do basic positioning...
        
               | XorNot wrote:
               | Basic yes, but drones are precision strike weapons by
               | necessity: they can't carry enough payload to kill
               | everything in a 50m radius for example. They depend on
               | generally nailing a single target with cm-level
               | precision.
               | 
               | And all that stuff is a new supply chain and more weight
               | which isn't payload.
               | 
               | That a countermeasure can be built doesn't mean it's
               | necessarily effective to do so - your drones get less
               | cheap, less numerous, you have to incorporate such
               | systems into tactical and strategic planning.
        
               | imtringued wrote:
               | Also you can't buy the drones off AliExpress anymore.
               | This shouldn't be underestimated, because all the drone
               | swarm wet dreams were built on this.
        
               | ReptileMan wrote:
               | >payload to kill everything in a 50m radius for example.
               | 
               | cluster heads solve this beautifully because 1kg of high
               | explosive kills everything good enough in 5 meters
               | radius.
        
               | XorNot wrote:
               | Which is still _nothing_ in terms of area lethality
               | terms.
               | 
               | For comparison, the Excalibur GPS guided artillery shell
               | was considered precision because it would hit within 5m
               | reliably.
               | 
               | Compare to the lethal range of a 155mm, where the kill
               | radius is 50m and casualty at 100m.
        
               | themgt wrote:
               | You're talking about a counterdrone system that's at
               | technology demonstrator stage. I don't think they even
               | have any contract or timeline for delivering production
               | systems. Meanwhile tech used in the Ukraine war is
               | adapting by the month.
               | 
               | "That a countermeasure can be built doesn't mean it's
               | necessarily effective to do so" applies especially to
               | reading a corporate press release about a system doesn't
               | even have a timeline for being on the battlefield.
        
               | Animats wrote:
               | More than basic. DJI offers full GPS-less camera and
               | accelerometer based nav technology on their drones.
        
               | KK7NIL wrote:
               | A compass is not blocked by a Faraday cage as low
               | frequency magnetic fields still get through.
        
               | varjag wrote:
               | I was thinking a ferrous shield would warp magnetic flux
               | lines but I could be wrong. And guess you could mill the
               | enclosure from brass, tho it's still not clear how would
               | you get an RF ground up there.
        
             | cyberax wrote:
             | Or you can put motors inside the cage, with purely
             | mechanical linkage to the propellers.
        
               | varjag wrote:
               | You'd have to make sure the linkages are not conductive
               | and there is not even a 1mm clearance on their ports in
               | the enclosure. Non-metal axles are possible but it's hard
               | to find material that would withstand the torque.
               | 
               | You also need to think through your cooling solution.
               | Enclosed batteries, converters and motors will generate a
               | lot of heat over typical mission, and you don't have the
               | benefit of direct air cooling anymore.
        
               | amluto wrote:
               | How about using a metal axle that penetrates the cage
               | using an intentionally conductive bearing, i.e. a slip
               | ring? It would need very low RF impedance, but it would
               | only need to last for the expected lifespan of the drone.
               | 
               | At just a few GHz, metal mesh ought to be adequate for
               | the cage material, so cooling isn't necessarily a huge
               | problem.
        
             | topspin wrote:
             | > Only tricky thing is if currents induced in motors
             | 
             | Many of the drones in the Russia-Ukraine war are powered by
             | ICEs. I'm thinking of Ukraine's long range drones presently
             | deleting Russia's refinery distillation towers, fixed radar
             | installations, parked aircraft, ammo dumps, etc.
             | 
             | Those engines are not purely mechanical, but purely
             | mechanical engines have been widespread and are still
             | commonplace today. A 2-stroke diesel being one example, but
             | even gas turbines can be purely mechanical. So one can
             | imagine such an adaptation in response to microwave
             | countermeasures.
        
             | Animats wrote:
             | The motor drive side probably isn't that vulnerable, since
             | that's the output side of large power transistors, but the
             | Hall-effect sensors and current sensing in brushless DC
             | motors might be a problem. But you don't have to use
             | brushless motors. They last longer, but drones are ammo,
             | not assets, today.
        
         | russfink wrote:
         | Pika-CHUUUUU! Wow. Now only if they could weaponize lightning
         | strikes.
        
           | animuchan wrote:
           | Taping a grenade to it (instead of the lightning guidance
           | thing) will be probably as efficient or more, as a weapon.
           | 
           | If they could weaponize earthquakes instead, now that'd be
           | brilliant.
        
           | egberts1 wrote:
           | Yes, that has already been achieved by dropping a fine spool
           | of thin "aluminum" wire over the target enemy's position and
           | then climbing up to 1,500' altitude during a thunderstorm.
        
       | theearling wrote:
       | I'm wondering if this would work for cars in car chases, maybe
       | too much shielding...
        
       | guerrilla wrote:
       | Send it to Denmark, please.
        
       | burnt-resistor wrote:
       | Makes a big assumption that they're synchronously remote
       | controlled over RF.
       | 
       | Fiber lasers can direct 10's-100's of kW of power almost
       | continuously and with a range of several km with proper optics:
       | 
       | https://youtu.be/BkbVeA4Lejc
       | 
       | https://youtu.be/lFMvesTUjAA
       | 
       | https://youtu.be/eFiDYFnlp7s
        
       | dsq wrote:
       | Maybe off topic, but I was wondering if the EM countermeasures
       | harm the bird life.
        
       | cantor_S_drug wrote:
       | What happened to the thesis of yesteryears of Nuclear Deterrence?
       | At these point, I feel like countries actually want wars to
       | continue.
        
         | XorNot wrote:
         | It doesn't work if you don't have nuclear weapons.
        
           | cantor_S_drug wrote:
           | Russia has nukes and it doesn't use them. Why is it behaving
           | responsibly in this regard? Is Russia thoughtful that Ukraine
           | doesn't have nukes so it shouldn't use them. It seems that
           | both sides want the war to continue.
        
             | palmfacehn wrote:
             | As an armchair Internet commentator, my theory is that the
             | deliberately provoked proxy war is designed to drain
             | Russian resources, gauge their capabilities and potentially
             | destabilize without direct engagement. I would agree that
             | neither side is interested in stopping the war at this
             | stage.
        
               | cantor_S_drug wrote:
               | There could be multiple reasons. You can't hurt russia
               | too much because they have the nukes. Russia can't lose
               | and Ukraine can't win. The deterrence if it existed
               | should have worked for Russia because America showed to
               | the world that wars can be stopped prematurely and on
               | your terms. This is a moral way to test more weapons on
               | both sides. This war will let all parties know who stands
               | where. This is more like bickering between superpowers
               | and to establish a new equilibrium.
        
               | XorNot wrote:
               | As an armchair internet commentator it's so weird how you
               | managed to cook up verbatim wordage to Russian propaganda
               | and chose to state the origin of the conflict as if a
               | sovereign people being invaded deserved it.
        
             | shawabawa3 wrote:
             | If Russia nukes Ukraine (or anyone else) NATO would declare
             | war on Russia, that's the only reason Russia is not using
             | them
        
               | rkomorn wrote:
               | The longer this war goes on the more skeptical I am that
               | NATO wouldn't just wag a finger angrily and then impose
               | more sanctions.
        
             | short_sells_poo wrote:
             | I presume they evaluated the global response to dropping
             | nukes and decided it's not worth it.
             | 
             | A nuclear first strike is a red line for pretty much every
             | major country. Russia would likely face extremely severe
             | sanctions even from their remaining trading partners.
        
       | agumonkey wrote:
       | I wonder if someone will embed microwave sinks to recharge
       | batteries
        
       | torginus wrote:
       | Laughable garbage. Notice the article fails to state at what
       | range the system engaged the drones or the size of the system
       | itself. I suspect this is a container sized system that costs
       | tens of millions of dollars, and has an engagement range of maybe
       | a couple miles against non-hardened targets.
       | 
       | Drone swarms also only exist as a flight of fancy not a real
       | threat. We know how drones are actually utilized, and the 'swarm'
       | you are talking about constists of a dozen drones spread out
       | maybe over 10 square miles.
       | 
       | If you're so confident in your system, then send it to Ukraine
       | (or considering the current admin, Russia might be more your
       | speed).
       | 
       | I wish the day would come when Americans would look at R&D as a
       | valuable and meaningful activity in of itself, not as some sort
       | of long con designed to allow investors and VCs to magic money
       | out of nowhere.
        
       | dismalpedigree wrote:
       | Epirus makes some good stuff from what I hear. Its use cases are
       | limited though. Its another exquisite system. This means it will
       | be high cost and low volume.
       | 
       | Sure bases and high value assets will have great protection. They
       | already do. Stinger missiles (1 example) have been able to hit
       | quads since the day quads took to the air. The cost asymmetry
       | (150k+ vs 1k) means they are rarely used so you have to let most
       | drone threats go.
       | 
       | The opening days of the Ukraine war showed that all you need to
       | do to stop an army is tale out its undefended logistics tail.
       | Fuel trucks, water, ammo, food, etc. These need to be protected
       | also, and exquisite system like Epirus wont be part of these
       | convoys.
       | 
       | Another take away from Ukraine is the lay-in-wait tactic where
       | drones sit near the road hidden and wait for you to come by. The
       | Epirus system (and most of the other cUAS systems) are not able
       | to help. You are probably over a slight hill, hidden by trees, or
       | too close to the danger zone where a bigger system would also
       | destroy you.
       | 
       | Basically everything and everyone has to have a means of engaging
       | these threats. It must be cheap (cost per kill including the
       | initial system purchase), easy to use, and widely available.
        
       | AuthAuth wrote:
       | Why do I feel like this is going to be defeated by some household
       | item that costs $2
        
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