It is not true that "wings will always provide lift as long as there is air flowing over it". Once a wing stalls, all it provides is drag.
AA191 crashed in the way it did because the crew reduced speed to V2 when they realised something was wrong. That's what the checklist says to do on a DC10 in the event of engine failure during take-off/climb out. However, the crew did not realise they had also lost hydraulic pressure in the left wing, and that loss caused the leading edge slats to retract. With no leading edge slats, V2 is not fast enough for a wing to produce lift and the left wing stalled. The right wing did still have flaps an slats, so was still producing lift. The result of lift on the right wing and a stall on the left wing are what caused AA191 to roll left and crash in the way it did. If the crew had maintained their original speed, the left wing would not have stalled, it would not have rolled left, and simulator test showed the plane could have remained airborne - although given it was on fire and had compromised hydraulics no way of knowing how long it could have remained airborne.
In this case, the plane appears to have been level until it hit the ground. Dashcams show no evidence of roll.
- 06 November 2025, 19:24:11
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News:
Welcome to OOF
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on: Today at 18:53:14
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| Started by Marks DTM Calib - Last post by LC0112G | ||
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on: Today at 18:35:42
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| Started by Marks DTM Calib - Last post by Kevin Wood | ||
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Quote The two things they needed they didn't have... Airspeed and altitude. The wings will always provide lift as long as there is air flowing over it. Removing thrust on one side causes a loss of airspeed over that wing. Less airspeed equals less lift. Likewise the yaw induced by the loss of balanced thrust further slows the unpowered wing causing more loss of lift. As the wing drops the aircraft will always roll to that side. Once the left wing touched the lift from the working wing finished the roll. Yes, but all of these effects of asymmetric thrust are possible to counter with control inputs until the wing stalls, which didn't happen in this incident, judging by the footage I've seen, but did, almost instantly, for AA191 due to slat retraction below the clean stalling speed. I'd say the crew in this case did a great job of keeping the aircraft flying to the crash site. Sadly, it didn't help them or the souls on the ground. |
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on: Today at 18:29:18
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| Started by STEMO - Last post by STEMO | ||
I'm pretty sure it won't take them long to figure it out. But it's something that will never affect me.Which means that if it's only £250, then they are still being £350 in pocket compared with ICE drivers,20,000 miles per annum will cost you £600 ![]() |
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on: Today at 18:18:52
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| Started by STEMO - Last post by Sir Tigger KC | ||
Which means that if it's only £250, then they are still being £350 in pocket compared with ICE drivers,20,000 miles per annum will cost you £600 Who's going to admit to doing 20,000 miles though if it's down to the drivers to estimate their mileage? ![]() The Government will soon discover that most EV's are just runabouts doing two or three thousand miles a year. ![]() |
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on: Today at 18:03:53
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| Started by STEMO - Last post by TheBoy | ||
And important, current, news stories are pushed back to 1 liners, with their concentration on whatever is happening at Southport. Don't get me wrong, that was a very sad attack for the local community, but it doesn't need a 10 minute delay update every single day.So, serious shit is going down in central Birmingham, and what is the BBC News' lead story? More oppsing Southport inquiry shit. |
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on: Today at 17:31:28
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| Started by STEMO - Last post by STEMO | ||
Which means that if it's only £250, then they are still being £350 in pocket compared with ICE drivers,20,000 miles per annum will cost you £600 |
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7
on: Today at 17:30:42
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| Started by STEMO - Last post by Sir Tigger KC | ||
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Quite right too!
I don't see why these smug greenies should swan about for nothing. ![]() |
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on: Today at 17:22:57
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| Started by Sir Tigger KC - Last post by Sir Tigger KC | ||
Very true. They are playing a very long game. My knowledge of the scriptures is pretty sketchy, but I think I'm right that there's something in the Bible about the 'yellow race' ruling the world? ![]() |
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on: Today at 17:03:43
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| Started by STEMO - Last post by ronnyd | ||
And important, current, news stories are pushed back to 1 liners, with their concentration on whatever is happening at Stockport. Don't get me wrong, that was a very sad attack for the local community, but it doesn't need a 10 minute delay update every single day.I think it's due to the public inquiry, sorry, i meant arse covering, that's going on about it at the moment. |
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on: Today at 16:55:45
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| Started by STEMO - Last post by ronnyd | ||
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Which means that if it's only £250, then they are still being £350 in pocket compared with ICE drivers,
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