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=0.6 required=5.0 tests=BAYES_40,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f5d71,d275ffeffdf83655 X-Google-Attributes: gidf5d71,public X-Google-Thread: f849b,d275ffeffdf83655 X-Google-Attributes: gidf849b,public X-Google-Thread: 101b33,d275ffeffdf83655 X-Google-Attributes: gid101b33,public X-Google-Thread: 103376,d275ffeffdf83655 X-Google-Attributes: gid103376,public X-Google-Thread: 1108a1,d275ffeffdf83655 X-Google-Attributes: gid1108a1,public X-Google-Thread: 146b77,d275ffeffdf83655 X-Google-Attributes: gid146b77,public X-Google-Thread: 109fba,d275ffeffdf83655 X-Google-Attributes: gid109fba,public X-Google-Thread: 115aec,d275ffeffdf83655 X-Google-Attributes: gid115aec,public From: David Gillon Subject: Re: Ada vs C++ vs Java Date: 1999/01/13 Message-ID: <369CF2EF.AC875B2A@gecm.com>#1/1 X-Deja-AN: 432239645 Content-Transfer-Encoding: 7bit References: <369C1F31.AE5AF7EF@concentric.net> <369CBAED.20BE91CA@pwfl.com> Content-Type: text/plain; charset=us-ascii Organization: GMAv Rochester Mime-Version: 1.0 Newsgroups: comp.lang.ada,comp.lang.c++,comp.vxworks,comp.lang.java,comp.java.advocacy,comp.realtime,comp.arch.embedded,comp.object,comp.lang.java.programmer Date: 1999-01-13T00:00:00+00:00 List-Id: Marin David Condic wrote: > > I've got a jet engine control for the F22 fighter that is programmed in > Ada and another one for the JSF programmed in Ada. Those engines aren't > going away any time real [SNIP] > On the commercial side, we have large turbofan engines with controls > programmed in Ada and they have the same life expectancy issues and > verification issues. Lots of commercial avionics (Boeing 777 leaps to > mind) are programmed in Ada. Ask yourself how old the Boeing 747 is > (they first came out when I was a kid!) and it will give you some idea > as to how committed Boeing is to Ada. Good points, I suspect that most people outside of the aerospace industry underestimate the life expectancy of our current generation of Ada projects by a considerable margin. Modern military aircraft run 15 year development cycles before service entry and can reasonably expect to be in production for ten years or more, with possibly 40 year service lives per airframe, for an inception to retirement duration of potentially 65 years. The next generation of Western jets (F-22, JSF, Typhoon (and Rafale?)) are all going to be heavily Ada dependent, and can reasonably be expected to be in service, and therefore with a need for continuing Ada based software support, past 2050 at least. The same goes for 777, and given that 747 is still in active development of new variants 30 years after service entry 2050 may be a conservative estimate. ----- David Gillon MAv Rochester