From: Bob Leif
To: Craig Spannring et al.
I wonder how many billions the demise of the Ada Mandate will cost us. A
previous, very expensive failure was the lack of separation of the
antimissile warhead from the rocket. Was this the result of a software
error? In what language is Star Wars II being programmed? I suspect that, at
present, the simulations are much more important than the media events. I do
believe that the chivalry shown by the US Defense Department in originally
funding an excellent Ada compiler and ensuring its availability in its
entirety to our enemies was excessive.
From: Team Ada: Ada Advocacy Issues (83 & 95)
[mailto:[log in to unmask]]On Behalf Of Craig Spannring
Sent: Wednesday, November 08, 2000 12:11 AM
To: [log in to unmask]
Subject: Re: NASA X-38 Question
Roger Racine writes:
> At 02:01 PM 11/3/2000 , [log in to unmask] wrote:
> >NASA's page on the recently tested X-38 crew return vehicle
> >(http://www.dfrc.nasa.gov/PAO/PAIS/HTML/FS-038-DFRC.html) contains the
> >following statement:
> >"The X-38 flight computer is commercial equipment that is currently used
> >in aircraft, and the flight software operating system is a commercial
> >already in use in many aerospace applications."
> >Does anyone on this list have more details on the X-38 software that
> >can share?
> >F. Britt Snodgrass
> VxWorks OS, application software is written in C.
> Roger Racine
Date: Mon, 6 Nov 1972 16:46:10 -0500 (EST)
From: "James H. Paul" <[log in to unmask]>
Subject: Unplanned roll in NASA's X-38
*Aviation Week & Space Technology*, 6 Nov 2000, p. 24
"NASA's X-38 Vehicle 131R did a slow, 360-deg. roll after release from its
B-52 carrier aircraft on Nov. 2. It was the first free flight of the
vehicle, which automatically stabilized under the preprogrammed deployment
of a drogue chute and made a successful landing under parafoil on a dry
lakebed runway, as scheduled, at Edwards AFB, Calif. The vehicle
no damage in the test. Project officials said they would have to do some
trouble-shooting to figure out why the Crew Return Vehicle (CRV) prototype
rolled at an estimated average rate of about 20 deg. per sec. during its
sec. of scheduled free flight. A software problem in the vehicle's flight
control system was suspected, although project officials were also looking
at whether aerodynamic disturbances immediately after separation might
played a role. Actual separation from the B-52 was clean, and the flight
control system maintained angle of attack throughout the 18-sec. roll.
vehicle is an 80%-scale version of the CRV designed to provide emergency
escape for International Space Station crews."