F-22 Software glitch
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BattlerBritain: You could have read it here first.
http://www.pprune.org/forums/showthread.php?t=264270
http://www.pprune.org/forums/showthread.php?t=264270
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I did do a Search here for F-22 ... and ... came back with nothing.
Last edited by Confucius; 28th Feb 2007 at 08:21.
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Why am I not surprised ?!
When the Sea Harriers were deployed to the Falklands, the INS toppled as no-one had tried it South of the equator !
When the Sea Harriers were deployed to the Falklands, the INS toppled as no-one had tried it South of the equator !
Wasnt the INS topple caused by trying to align the system on a moving deck hence the the corporate mod to RAF GR3s?
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Bit late to the thread but I am amazed in that in the days of 'Coalition' aircraft flying all over the world delivering the democracy message that the latest Gucci kit had a meltdown over crossing the date line.....
They should have fired up FS2004 to test it
They should have fired up FS2004 to test it
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INS Issues
Glory Days!
Reminds me of the Litton 14A in the old F-111C Classics - We used to watch the analogue Lat/Long readouts (like an old car odometer) as we appraoched both the equator and date line; praying that they would cope with changing from South to North or East to West.
Too long spinning along in the 1 hemisphere made for worn out cogs!
Reminds me of the Litton 14A in the old F-111C Classics - We used to watch the analogue Lat/Long readouts (like an old car odometer) as we appraoched both the equator and date line; praying that they would cope with changing from South to North or East to West.
Too long spinning along in the 1 hemisphere made for worn out cogs!
SHARs in The Falklands
Are you seriously telling me that the SHARs had never been south of the equator prior to their 1982 jolly?
So much for global carrier ops!
Where is WEBF when you need him!
So much for global carrier ops!
Where is WEBF when you need him!
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Sea Harrier
Whiz,
The GR3 had a different system; that was the one requiring the mod' to use on deck - ie unusual territory ( though the idea seemed to have been up someone's sleeve before the Falklands actually happened, or it was come up with amazingly quickly ).
The GR3 had a different system; that was the one requiring the mod' to use on deck - ie unusual territory ( though the idea seemed to have been up someone's sleeve before the Falklands actually happened, or it was come up with amazingly quickly ).
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Double Zero
I believe the corporate mod to RAF Gr3s entailed slaving the INAS system to the ships onboard nav equipment to prevent system topple. Apparently the ships movement - not only pitch and roll - but actual course, prevented the system aligning correctly, ie insert lat/long of present position and by the time the system was ready to use the boat would have sailed a few miles further thus screwing up the co-ords.
Amazing what you can trawl up on PPRuNe http://www.pprune.org/forums/archive.../t-146822.html
I believe the corporate mod to RAF Gr3s entailed slaving the INAS system to the ships onboard nav equipment to prevent system topple. Apparently the ships movement - not only pitch and roll - but actual course, prevented the system aligning correctly, ie insert lat/long of present position and by the time the system was ready to use the boat would have sailed a few miles further thus screwing up the co-ords.
Amazing what you can trawl up on PPRuNe http://www.pprune.org/forums/archive.../t-146822.html
Last edited by whiz; 28th Feb 2007 at 07:28.
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F22 Swallows Pilot...
on a similar theme (all apologies if mentioned before):
A hapless US Air Force pilot had to be physically cut free from the cockpit of his F-22A Raptor when the canopy resolutely refused to open, Flight International reports.
The mini-drama unfolded on 10 April at the 27th Fighter Squadron's base at Langley AFB, Virginia, when the canopy "became stuck in the down and locked position and could not be opened manually after the pilot cycled the mechanism several times, following a pre-flight warning that the canopy was unlocked".
Accordingly, an emergency team of ground operatives moved in after five hours and attacked the $134m Raptor with a decidedly unstealthy and low-tech chainsaw with which they unceremoniously sawed open the offending canopy. The estimated repair bill is a whopping $180,000.
The F-22 Raptor was rolled out a couple of years ago after 19 years in development. The US military and makers Lockheed Martin wasted little time in trumpeting the beast's awesome capabilities, as LM's blurb demonstrates:
No fighter in the world comes close to matching the F-22. By every measure, the Raptor represents extraordinary breakthroughs in manoeuverability, stealth, sensor fusion - a wealth of parameters that define a new era in fighter capability.
Ahem. The breathless eulogy concludes: "With the F-22, the era of US air dominance - against all ground and air-based threats - has begun."
Yes indeed. We look forward to the rumoured sequel to Top Gun which will feature Tom Cruise trapped for five hours in his F-22 after which Nicole Kidman rolls up to tell "Maverick": "Don't you think this has gone on long enough? It's time for you to come out of the cockpit. You're not fooling anyone."
A hapless US Air Force pilot had to be physically cut free from the cockpit of his F-22A Raptor when the canopy resolutely refused to open, Flight International reports.
The mini-drama unfolded on 10 April at the 27th Fighter Squadron's base at Langley AFB, Virginia, when the canopy "became stuck in the down and locked position and could not be opened manually after the pilot cycled the mechanism several times, following a pre-flight warning that the canopy was unlocked".
Accordingly, an emergency team of ground operatives moved in after five hours and attacked the $134m Raptor with a decidedly unstealthy and low-tech chainsaw with which they unceremoniously sawed open the offending canopy. The estimated repair bill is a whopping $180,000.
The F-22 Raptor was rolled out a couple of years ago after 19 years in development. The US military and makers Lockheed Martin wasted little time in trumpeting the beast's awesome capabilities, as LM's blurb demonstrates:
No fighter in the world comes close to matching the F-22. By every measure, the Raptor represents extraordinary breakthroughs in manoeuverability, stealth, sensor fusion - a wealth of parameters that define a new era in fighter capability.
Ahem. The breathless eulogy concludes: "With the F-22, the era of US air dominance - against all ground and air-based threats - has begun."
Yes indeed. We look forward to the rumoured sequel to Top Gun which will feature Tom Cruise trapped for five hours in his F-22 after which Nicole Kidman rolls up to tell "Maverick": "Don't you think this has gone on long enough? It's time for you to come out of the cockpit. You're not fooling anyone."
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F-22
Surely they didn't really use a chainsaw ?!
Then again with the U.S. system they could just go for the perspex, no M.D.C. to worry about I suppose.
Can't help thinking of the C.O.'s face when he hears " yessir, we're chainsawing it now..."
That'll teach him to leave his swiss army knife behind...or do they have sonic screwdrivers ?
Re. The Harrier INS alignment cart, I'm pretty sure there is a photo of it in John Godden's ' Ski Jump to Victory' - I'll try & find it.
Then again with the U.S. system they could just go for the perspex, no M.D.C. to worry about I suppose.
Can't help thinking of the C.O.'s face when he hears " yessir, we're chainsawing it now..."
That'll teach him to leave his swiss army knife behind...or do they have sonic screwdrivers ?
Re. The Harrier INS alignment cart, I'm pretty sure there is a photo of it in John Godden's ' Ski Jump to Victory' - I'll try & find it.
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Navigational software glitch forces Lockheed Martin F-22 Raptors back to Hawaii
Apparently the pilots lost all attitude-reference for safe IMC flight/landing, as well as significant loss of fuel-system controls and communications.
http://www.dailytech.com/article.aspx?newsid=6225
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Shipborne alignments
I'm sure that the shipboard alignment concept wasn't invented in a day for the GR3s. It was by then an old concept...The Litton 14A (the original 1960's F-111 INS) had a sea align switch for just such and event ... a legacy of the ill-fated USN F-111B model.
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Ship-board INS
As Whiz points out in his link to John Farley's article on GR3 INS alignment carts on ship, someone had worked it out well before the Falklands erupted, as I'd always thought.
When it was all going on, we were flat-out night & day at Dunsfold on other mod's , and no doubt various sub-contractors were too; we were much later told by then Test Pilot Steve Thomas, " none of it reached us before it was all over ", though I'm not sure if that includes the AIM9L fit for the GR3's, will have to refer back on that - age creeping on !
www.harrier.org.uk
is well worth a look.
When it was all going on, we were flat-out night & day at Dunsfold on other mod's , and no doubt various sub-contractors were too; we were much later told by then Test Pilot Steve Thomas, " none of it reached us before it was all over ", though I'm not sure if that includes the AIM9L fit for the GR3's, will have to refer back on that - age creeping on !
www.harrier.org.uk
is well worth a look.
Thread Starter
DelaneyT, yes, good to see that the tankers led the ailing Raptors home safely.....
Incidentally, the potential problems caused by over midnight and/or dateline operations have already been taken into account in the 21st Century Tanker's Mission Computer System!
And I don't mean some Boeing aeroplane yet to enter service!
Incidentally, the potential problems caused by over midnight and/or dateline operations have already been taken into account in the 21st Century Tanker's Mission Computer System!
And I don't mean some Boeing aeroplane yet to enter service!
Off topic to answer Double Zero
Double Zero at least three Tornados (one Gr at Honington that had a nose wheel collapse and the canopy was jammed by a slightly bent nose section) have had crew cut out using whatever saw was in the fire sections crash kit (Coningsby was where the others were) and the Typhoon rescue data module also has a cutting procedure for the canopy transparency after the couple of other options fail.
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Cutting canopies
Exrigger,
Sounds very reasonable in event of a bent airframe - I used to traipse along and photo' the Dunsfold Fire / Rescue team, who'd won awards & impressed the hell out of me ( difficult to film in a smoke filled room but I got other exploits ).
I should have thought there'd be a plan for cutting hoods, just
A; has it really come to that, re. cost etc,
B, The MDC which must be a worry on UK style a/c - I've flown in Hawks, and apart from being briefed to get out sooner rather than later, if I'd ended up on the deck in a bent airframe would have been very tempted to blow the canopy rather than have a chainsaw coming through at neck level - after all the chap with the saw might owe me a pint & be trying to get out of it !
Sounds very reasonable in event of a bent airframe - I used to traipse along and photo' the Dunsfold Fire / Rescue team, who'd won awards & impressed the hell out of me ( difficult to film in a smoke filled room but I got other exploits ).
I should have thought there'd be a plan for cutting hoods, just
A; has it really come to that, re. cost etc,
B, The MDC which must be a worry on UK style a/c - I've flown in Hawks, and apart from being briefed to get out sooner rather than later, if I'd ended up on the deck in a bent airframe would have been very tempted to blow the canopy rather than have a chainsaw coming through at neck level - after all the chap with the saw might owe me a pint & be trying to get out of it !
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Crossing The Equator
As I recall, the Nimrod MR1 suffered only one serious quirk when crossing the equator southbound. The navigation systems performed flawlessly and "George" flew her smoothly, thus allowing King Neptune to convene his court, with proper ceremony, in the galley, where the yoofs on the crew would pay homage. Suitable tribute, in the form of a tincture or twain for the old hands, would be paid after landing.
Cheers,
Neppy
Cheers,
Neppy