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: 103376,8aade3215ba33427,start X-Google-Attributes: gid103376,public From: "Marin David Condic, 561.796.8997, M/S 731-93" Subject: Re: Ada Success Story II Date: 1997/03/02 Message-ID: <97030217543582@psavax.pwfl.com>#1/1 X-Deja-AN: 222608785 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: 1997-03-02T00:00:00+00:00 List-Id: Dale Pontius writes: >There was a flyoff between the YF22 and the YF23, which the YF22 >won. What were they doing for flight software on the flyoff? I >could believe hacked F16 software, or something like that, except >isn't the F22 the first plane to use thrust vectoring? > For the record, the Pratt engines used in both the YF22 & YF23 had engine controls programmed in Ada. The contract officer overseeing our development efforts looked at how we develop control software in Ada and pronounced himself "suitably whelmed" and in commenting on our use of Ada said words to the effect of: "to think, I had to see it from an *engine* company" (as opposed to an avionics company, most of whom were staying away from Ada in droves.) The F22 is not the first plane to use thrust vectoring. There were a number of research programs that mounted thrust vectoring nozzles on things like the F15. We've even built a 3-D nozzle for the F100 engines used by F15s and F16s - nicknamed "the eyeball" because of it's ability to swivel around and open&close much like the pupil of an eye. The Harrier most certainly does thrust vectoring. And if one would want to pick a few nits, the commercial airliners have been using thrust vectoring (thrust reversers) long before the Air Force was willing to take a chance on such technology. Still, it's pretty cool to watch them test the F119 engine and have it pull its thrust vectoring tricks on the stand. There's a lot of technological advancement in this particular engine. 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 =============================================================================== "Airplanes are interesting toys but of no military value." -- Marechal Ferdinand Foch, Professor of Strategy, Ecole Superieure de Guerre. ===============================================================================