F-22 Software glitch
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F-22 Deployment Glitch....oops!
Navigational software glitch forces Lockheed Martin F-22 Raptors back to Hawaii, abandoning first foreign deployment to Japan.
See http://www.flightglobal.com/Home/Default.aspx
Hmmmm.......some rumours about the nav system being confused by the International Date Line and going "TILT - GAME OVER!"....
See http://www.flightglobal.com/Home/Default.aspx
Hmmmm.......some rumours about the nav system being confused by the International Date Line and going "TILT - GAME OVER!"....
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Dozerf22 on Fencecheck said this
Cheers
As you can read on the site we experienced a problem on the deployment leg from Hawaii to Kadena. I thinks its funny since there are so many complicated things that it would be so simple as a line of software code and I believe it's going to be about that simple. Who would have thought, or caught, the software line of code that divided 180 by 0 when you cross the dateline from east to west?? Obviously some engineer never considered that! From my perspective its one of those little things you continue to work out of the system as it matures - they already have a fix in place and the contractor has people on the ground fixing it - to be quite honest, I think its a tremendous sucess story - why? A problem was discovered (expected in a new jet no matter what Raptor opponents will say, NO jet has ever been problem free nor will there ever be), and within a few days its identified and a fix is being put in place in the field, 5,000 miles away out in the field on an operational deployment - that sure seems like one heck'uva a feat to me! In fact, they're now working on the code to make sure we don't discover another "feature" like that to make sure it's good around the globe.
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Guess they needed you "leading" them as per http://www.pprune.org/forums/showthread.php?t=260186 #4
"Tankers in the assault" go gettum tiger.
Bet they wish they had a tiger "lead" like you. So tell us what you would have done in that fighter..... oh, I forgot, you wouldn't have the slightest idea because you washed out of FJs.
There are those in the arena and those that really need to shut up.
Guess where retired tanker drivers that got busted out of FJ flying rank? (Hint: Tilt-Game Over)
"Tankers in the assault" go gettum tiger.
Bet they wish they had a tiger "lead" like you. So tell us what you would have done in that fighter..... oh, I forgot, you wouldn't have the slightest idea because you washed out of FJs.
There are those in the arena and those that really need to shut up.
Guess where retired tanker drivers that got busted out of FJ flying rank? (Hint: Tilt-Game Over)
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StbdD
Can you tell me how to edit posts without that 'last edited bit' pitching up at the bottom?
Obviously going to be a harsh banter day...
Can you tell me how to edit posts without that 'last edited bit' pitching up at the bottom?
Obviously going to be a harsh banter day...
Last edited by rudekid; 15th Feb 2007 at 06:37. Reason: Trying to find 'no edit' button!
This reminds me of the Decca TANS originally fitted to the RAF Sea Kings. When flying west towards the Scilly Isles the TANS used to throw a wobbly. What had happened was it had run off the end of the map and started from the beginning, positioning itself off the coast of Kent.
Just a line of software......
Just a line of software......
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Tin-foil hat time
Apparently there was some sort of anti-US demo scheduled for the same time as the F22s were supposed to arrive and by virtue of this slight delay they managed to avoid it.
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from jwcook's post:
erm, any self-respecting software engineer?
any decent software development process?
sw
Who would have thought, or caught, the software line of code that divided 180 by 0 when you cross the dateline from east to west??
any decent software development process?
sw
Thread Starter
StbdD, you are indeed showing your complete ignorance of force extension operations.
When a tanker trails receivers, the tanker captain is the formation leader. Period. This is particularly true when a cell of tankers leads a number of receivers.
For example, on Night 1 of GW1, the lead tanker captain of the 3 x VC10K and 8 x Tornado formation was the formation leader until the cast-off point. That's the way it still is.
May I recommend ATP-56A, UK AARNIs and ATP-56B draft for some light bedtime reading. Which, in your case, is probably at around 1900?
"There are those in the arena and those that really need to shut up." - quite so, so why don't you follow your own advice and do so?
When a tanker trails receivers, the tanker captain is the formation leader. Period. This is particularly true when a cell of tankers leads a number of receivers.
For example, on Night 1 of GW1, the lead tanker captain of the 3 x VC10K and 8 x Tornado formation was the formation leader until the cast-off point. That's the way it still is.
May I recommend ATP-56A, UK AARNIs and ATP-56B draft for some light bedtime reading. Which, in your case, is probably at around 1900?
"There are those in the arena and those that really need to shut up." - quite so, so why don't you follow your own advice and do so?
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Didn't some F jets of some kind have a similar problem when they dropped low over the dead sea? Jet had a kinda hissy-fit that they were flying underground - or is this another urban myth?
Still, nice to see that a critical mil-spec piece of software has gone thru all that expensive, rigourous testing
Still, nice to see that a critical mil-spec piece of software has gone thru all that expensive, rigourous testing
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F-22 Software glitch
Don't know if anybody's seen this but it appears that F-22's deploying to Okinawa suffered a major nav system software glitch when crossing the International date line.
References are at Aviation Week:
http://www.avionews.com/index.php?co...po%3Dindex.php
and at:
http://it.slashdot.org/article.pl?si...38217&from=rss
Sorry if the last reference appears a bit blogg-ish, but it's the only one I could find with decent detail of the event.
Cheers,
Battler
References are at Aviation Week:
http://www.avionews.com/index.php?co...po%3Dindex.php
and at:
http://it.slashdot.org/article.pl?si...38217&from=rss
Sorry if the last reference appears a bit blogg-ish, but it's the only one I could find with decent detail of the event.
Cheers,
Battler
History lessons...
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There was a similar issue with one of their earlier aircraft years ago - crossing the equator I believe the nav system got confused. These things happen with complex software - especially when at the limits or beyond development areas.
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There was a similar issue with one of their earlier aircraft years ago - crossing the equator I believe the nav system got confused. These things happen with complex software - especially when at the limits or beyond development areas.
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Nav systems
In the case of the Sea Harrier, if some far-sighted individual had said, " I know, let's see if the thing works in one of our dependency regions, say the Falklands" the bean counters even in those days would have been onto it in a flash.
" Some B----d's trying to generate a luxury jolly !"
" Some B----d's trying to generate a luxury jolly !"
