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Lockheed's F-22 Raptor Gets Zapped by International Date Line
DailyTech LLC ^
| February 26, 2007
| Brandon Hill
Posted on 02/26/2007 2:47:19 PM PST by SubGeniusX
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To: buckalfa
Does Russia still produce MIGs with vacumn tubes in the circuitry? The idea was to keep the fighters airborne in case of EMP.You know, I have no idea. I can sometimes identify a jet on sight, but when it comes to how they're built I'm about as helpless as poor Homer.
41
posted on
02/26/2007 3:14:50 PM PST
by
Zeroisanumber
(Quis custodiet ipsos custodes?)
To: Tallguy
Sure, but there is still the International Date Line.
42
posted on
02/26/2007 3:17:01 PM PST
by
RightWhale
(300 miles north of Big Wild Life)
To: fremont_steve
There is a story about the F16 flipping to inverted flight after crossing the date line from years back. Early versions of the F-16's software would have caused it to invert when it crossed the equator. The problem was discovered during simulations.
Considering it this was once a pretty famous "bug" - it was cited in a lot of presentations about software quality assurance - one can only conclude that a new generation of software engineers had never heard of it.
-------
The F-16 was also supposed to have been the aircraft with the almost-as-famous in the software industry "wheels up" programing error:
http://catless.ncl.ac.uk/Risks/3.44.html#subj1
To: Candor7
I do not believe this quite It's true as written.
I work for the Air Force. I am a Software Safety Engineer (on a different program I hasten to add!).
We are now trusting SW produced by industry by 'Extreme Programming', or 'Scrum' techniques to perform safety critical functions. This is what happens.
The FAA has lots of SW design and test stipulations to prevent this on commericial planes, but the military went to a 'best industry practices', vice tight SW design/test regs under 'Acquisition Reform'.
This kinda thing happens occasionally and will get more frequent....
44
posted on
02/26/2007 3:18:09 PM PST
by
Cogadh na Sith
(There's an open road from the cradle to the tomb.)
To: Paleo Conservative
45
posted on
02/26/2007 3:18:09 PM PST
by
Tribune7
(A bleeding heart does nothing but ruin the carpet.)
To: llevrok
what's next? The new daylight saving time zapping them?
46
posted on
02/26/2007 3:18:33 PM PST
by
KarlInOhio
(Samoans: The (low) wage slaves in the Pelosi-Starkist complex.)
To: Tallguy
Back when Amelia Earhart was flying around the world, the island she was trying to land on (Howland Island) was on a 1/2 hour shifted clock. The Navy ship a few miles off Howland was using a clock referenced to Hawaii time and was on an hour shift. (Ship time was 1100, island time 1130 or something). I forget what clock Earhart was using, but it was an hour shifted - perhaps referenced to Papau New Gueani (sp) Time
The ship had higher freq. communications and would attempt to contact Earhart at 15 min. and 45 min. past the hour, while the island had low freq. communications and would try contacts at the hour and half hour.
Earhart had to switch between the frequencies at the proper times, plus trying to use a tracking beacon frequency..
They figure the miscommunication of the time was one of the numerous problems that led to Earhart missing Howland Island. Based on the investigation of the Earhart disappearance everything military and shipping, etc. went over to GMT.
47
posted on
02/26/2007 3:19:29 PM PST
by
geopyg
(Don't wish for peace, pray for Victory.)
To: JRios1968
48
posted on
02/26/2007 3:19:30 PM PST
by
LasVegasMac
(Islam........not fit for human consumption.)
To: SubGeniusX
uh....I dont believe this story at all.
To: BillM
There is some coating on the canopy of newer tactical aircraft that doesn't allow the use of hand held GPS units.
I used to use one all the time flying F-14A's because our INS was so bad.
50
posted on
02/26/2007 3:20:14 PM PST
by
USNBandit
(sarcasm engaged at all times)
To: LasVegasMac
51
posted on
02/26/2007 3:20:51 PM PST
by
JRios1968
(Tagline wanted...inquire within)
To: BurbankKarl
See my post above. It's true.
52
posted on
02/26/2007 3:21:59 PM PST
by
Cogadh na Sith
(There's an open road from the cradle to the tomb.)
To: adorno
"What's a MAC, by the way?"
It's a fad that will hopefully die out soon along with the company.
53
posted on
02/26/2007 3:22:08 PM PST
by
miliantnutcase
("If it moves, tax it. If it keeps moving, regulate it. If it stops moving, subsidize it." -ichabod1)
To: M. Dodge Thomas
To: Ramius
Something to do with sat data feeds, GPS maybe?
just swinging the bat......
55
posted on
02/26/2007 3:24:13 PM PST
by
LasVegasMac
(Islam........not fit for human consumption.)
To: Cogadh na Sith
Thanks for the confirmation ...
bet you have some "nifty" little anecdotes ...
56
posted on
02/26/2007 3:26:00 PM PST
by
SubGeniusX
("BLAMMO! Eyes melt, skin explodes, everybody dead!")
To: SubGeniusX
Although most of them aren't going to be as critical as an aircraft control system, there are probably many programs and systems that have been broken as a result of Congress' [bleep]ing decision to change around daylight saving time rules.
Although UTC is used in a lot of places to report things like timestamps, some places use local time. Because neither Windows nor any other system I know of has a time-zone structure that allows different rules to be applied in different years, the change in daylight rules will cause a retroactive change in timestamps for some files dated in late March or October, or early April or November. This may in turn wreak havoc with configuration management systems, makefiles, etc.
Did anyone in Congress even think about any such issues!?
57
posted on
02/26/2007 3:29:13 PM PST
by
supercat
(Sony delenda est.)
To: USNBandit
I used to use one all the time flying F-14A's because our INS was so bad. That as bad as when F-15 pilots were using radar detectors - from Radio Shack - in the cockpit.
Forget what the deal was, certain band, etc. I do know that I found a few and had to stop by OP's, "who owes me beer?" lol
58
posted on
02/26/2007 3:29:27 PM PST
by
LasVegasMac
(Islam........not fit for human consumption.)
To: Ramius
Uh... this sounds like an urban legend to me. The dateline appears on maps, not in the air. I can't see how it would have any effect whatsoever.
Whether they returned to Hawaii for this exact problem or not, fact it they did have to return for some software glitch.
The dateline has exact latitude/longitude coordinates, which the GPS and (if the F-22 has it) inertial guidance would feed into the system. I can see this event actually happening.
To: SycoDon
Two words: Production Testing
60
posted on
02/26/2007 3:35:14 PM PST
by
AppyPappy
(If you aren't part of the solution, there is good money to be made prolonging the problem.)
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