Xref: utzoo sci.aeronautics:99 sci.space:14433 sci.space.shuttle:3726 Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!ginosko!uunet!mcsun!sunic!sics.se!lhe From: lhe@sics.se (Lars-Henrik Eriksson) Newsgroups: sci.aeronautics,sci.space,sci.space.shuttle Subject: Re: X-30, Space Station Strangles NASP Message-ID: <1989Oct6.115012.6288@sics.se> Date: 6 Oct 89 11:50:12 GMT References: <5292@eos.UUCP> <4983@omepd.UUCP> <6430@quick.COM> Sender: lhe@sics.se (Lars-Henrik Eriksson) Reply-To: lhe@sics.se (Lars-Henrik Eriksson) Followup-To: sci.aeronautics Organization: Swedish Institute of Computer Science, Stockholm (Kista), Sweden Lines: 17 In-Reply-To: srg@quick.COM (Spencer Garrett) In article <6430@quick.COM>, srg@quick (Spencer Garrett) writes: >And what's the "E" in KEAS? Surely Edwards doesn't have its own >standard of measurement! :-} EAS = Equivalent Air Speed. This is the CAS corrected for the compressibility of air at higher speeds (higher dynamic pressure). In light aircraft the compressibility effects are negligible, so it is safe to set EAS=CAS. Indeed, when you convert TAS to CAS (or vice versa) using density altitude, you are usually converting between TAS and EAS instead, assuming EAS=CAS! -- Lars-Henrik Eriksson Internet: lhe@sics.se Swedish Institute of Computer Science Phone (intn'l): +46 8 752 15 09 Box 1263 Telefon (nat'l): 08 - 752 15 09 S-164 28 KISTA, SWEDEN