[HN Gopher] The Saturn V FUELDRAULIC Gimbal System (1963)
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       The Saturn V FUELDRAULIC Gimbal System (1963)
        
       Author : NaOH
       Score  : 35 points
       Date   : 2024-11-04 20:47 UTC (5 days ago)
        
 (HTM) web link (www.powermotiontech.com)
 (TXT) w3m dump (www.powermotiontech.com)
        
       | rwmj wrote:
       | Short but interesting answer about why "fueldraulic" systems are
       | still used, including on the Boeing 777, and F35:
       | https://aviation.stackexchange.com/questions/24787/why-is-fu...
        
       | pfdietz wrote:
       | The Merlin engine in the Falcon 9 also uses fuel (RP-1) as
       | hydraulic fluid, I believe.
        
         | dotancohen wrote:
         | I don't know about today, but early Falcon 9 gridfin actuators
         | used an open loop of RP-1 as the working fluid as well. It
         | would drain into the tank, and be burned in the engines on
         | descent.
        
       | fuzzfactor wrote:
       | After the Saturn V was retired, they put one out in the front
       | yard of the Johnson Space Center.
       | 
       | It was kind of sizable, and for years you could see it when you
       | drove by on NASA Road 1.
       | 
       | Laying sideways where the different stages were laid end-to-end,
       | and walk right up and touch it, with outdoor photo ops all over
       | the place.
       | 
       | Eventually they built buildings to enclose it, which you now have
       | to go inside if you want to take a look.
        
         | embedded_hiker wrote:
         | And the one time I have ever been to Houston, they were
         | constructing that building and I couldn't see the Saturn V :(
        
         | dotancohen wrote:
         | I remember seeing it in Florida when I was young, and when I
         | took my kids to the US for a wedding a few years ago that was
         | one of our stops. We say a Falcon 9 night launch, too.
         | 
         | The Saturn V was so impressive. I hope to take the kids to a
         | Starship launch to instill in them too the awe of rocketry and
         | space exploration.
        
       | acyou wrote:
       | Why does the hydraulic system need 2000 psi and the fueldraulic
       | system only needs 50 psi?
       | 
       | Then they needed to double hydraulic pressure to 4000 psi for the
       | new rocket, but never explained the key considerations. Seemed
       | like it would be the same actuator?
       | 
       | Cool article.
        
         | cvz wrote:
         | The way the article describes that diagram is misleading. The
         | whole diagram is the fueldraulic system, and it's 50 psi on the
         | return side and 2000 psi on the high pressure side like a
         | regular hydraulic system.
        
       | pixelpoet wrote:
       | They had Comic Sans in 1963?
        
         | PittleyDunkin wrote:
         | Do you think the diagrams are from 1963?
        
           | pixelpoet wrote:
           | Wasn't really being serious :)
        
       | quercusa wrote:
       | I love those mid-century names: FuelDraulic, Hydra-Glide,
       | PowerGlide, Ultramatic
        
         | greggsy wrote:
         | My personal fave is hydropneumatic suspension, mainly because
         | it's in the Citroen DS (my favourite MCM car).
        
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       (page generated 2024-11-09 23:00 UTC)