Newsgroups: sci.space
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: environmental effects of high-altitude flight
Message-ID: <1989Feb9.015057.1294@utzoo.uucp>
Organization: U of Toronto Zoology
References: <601326396.amon@H.GP.CS.CMU.EDU> <1205@esunix.UUCP> <15438@cisunx.UUCP> <574@internal.Apple.COM>
Date: Thu, 9 Feb 89 01:50:57 GMT

In article <574@internal.Apple.COM> ems@Apple.COM (Mike Smith) writes:
>And what about all the military supersonic fights?  Surely what is
>true of Eco-concerns for the Concord is also true for the SR71?

There are only a handful of operational SR-71s and they don't fly all
that much.  Virtually all other military supersonic aircraft spend
essentially all their time at relatively low altitudes and subsonic
speeds.

There is real reason for concern here, both for future SSTs and for
spaceplane developments.
-- 
Allegedly heard aboard Mir: "A |     Henry Spencer at U of Toronto Zoology
toast to comrade Van Allen!!"  | uunet!attcan!utzoo!henry henry@zoo.toronto.edu
