From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,b15ce5ed141cce4a X-Google-Attributes: gid103376,public From: "Marin David Condic, 561.796.8997, M/S 731-93" Subject: Re: Ada Success Story II Date: 1997/03/10 Message-ID: <97031011153122@psavax.pwfl.com>#1/1 X-Deja-AN: 224495137 Sender: Ada programming language Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU X-Vms-To: SMTP%"INFO-ADA@VM1.NODAK.EDU" Newsgroups: comp.lang.ada X-Vms-Cc: CONDIC Date: 1997-03-10T00:00:00+00:00 List-Id: Jon S Anthony writes: >> I suppose one could do away with some of the control surfaces on >> planes with vectoring nozzles, but I just don't see it happening in >> the real world. What happens if your engine flames out? You'd >> probably have no chance to attempt to relight it, you'd just have to >> punch out immediately. I suspect thrust vectoring would work best in >> conjunction with control surfaces on a plane specifically designed >> for it. > >This seems right to me too. BTW, even punching out would probably not >be under your control. My understanding is that the EFA is so >unstable that any control loss would be so violent and disorienting >that you would not be quick enough to punch out on your own. > Actually, nobody has any plans to remove the control surfaces from the tail of the plane any time soon. It's more of a long range goal which - if you prove out the technology of thrust vectoring - would be an atainable (and desirable) thing to do. (reduce drag, weight, etc.) Flame outs? Nobody is talking about doing this sort of thing on single engine craft just yet. *IF* it gets done, it would first be done on a dual engine craft similar to the F15 or F22. *IF* it worked successfully there and you started building enough confidence in the design (and in your Ada-programmed engine control's ability to keep the engine from stalling (had to get an Ada point in there ;-)) you might start designing a single engine craft around it. As for punching out of a mach-1 airplane that's gone unstable because the flight control went casters-up (Programmed in C?) - that sounds like a perfectly good way to ruin your whole day. There was a time when Aerospace Engineers didn't like fly-by-wire because they felt it wasn't reliable like their good, old, leaky hydraulics. And a time when hydraulics weren't considered as reliable as cables & pullies. Hence I think there will come a time when thrust vectoring nozzles will get enough trust to replace tail surfaces and pilots won't punch out of any more aircraft then than they do now because an actuator sticks & won't move the control surfaces. MDC Marin David Condic, Senior Computer Engineer ATT: 561.796.8997 M/S 731-96 Technet: 796.8997 Pratt & Whitney, GESP Fax: 561.796.4669 P.O. Box 109600 Internet: CONDICMA@PWFL.COM West Palm Beach, FL 33410-9600 Internet: CONDIC@FLINET.COM =============================================================================== "Eagles may soar, but a weasle never gets sucked up into a jet engine." -- Author Unknown ===============================================================================