Study of V1/V2

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02-23-2007, 11:28 PM

HSLD

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Study of V1/V2

Looks like different certification standards?

http://airlinepilotcentral.com/web_v...070224205.html

02-23-2007, 11:38 PM

ToiletDuck

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HSLD quick question.... I noticed they held the nose up after the bird strike. Was this to airbrake? I don't know if I'm using the term properly or not as I'm not in that large of an aircraft. Were they holding the nose up to use the wings to help stop? Why not just push the nose over(put more weight ont he mains), pick up the flaps, and hit the breaks? The video makes it look like they didn't have any spoilers or anything out as well.

02-23-2007, 11:52 PM

CE750

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I think they aborted after Vr, not that they used the nose as air brakes.

02-24-2007, 12:17 AM

HSLD

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Quote:

Originally Posted by ToiletDuck

HSLD quick question.... I noticed they held the nose up after the bird strike.

I have no idea what they were doing or the circumstances that got them there. My comment was reference not being able to fly after an apparent engine failure after V1. The FARs require US certified aircraft to be able to fly after losing one engine past V1 (paraphrased reg).

I don't want to play armchair quarterback but it seems like if the "only" problem was a bird ingestion in a motor, the plane should have been able to fly at a speed past V1 (Yes I get spoiled with 92K of thrust per side in my light twin).

Bad day for those guys for sure, and fortunately no one died.

02-24-2007, 01:37 PM

1Seat 1Engine

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Quote:

Originally Posted by ToiletDuck

It's going to depend on the aircraft, and the speed and the weight at the time. In the F-16 a 13-15 degree AOA aerobrake is more effective than the wheel brakes if speed is greater than approx 100kts. If stopping distance is critical, you use both aerobraking and wheel braking until you can no longer hold the nose up (70-100 kts depending on weight and type of F-16). Unless you're pretty close to landing speed, aft stick pressure actually puts MORE weight on the mains, making the brakes more effective.

I don't know anything about the TU-154, but from a purely aeronautical perspective, aerobraking may help in an abort situation, depending on the type of a/c and probably a thousand other considerations.

02-25-2007, 08:41 PM

Ewfflyer

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Almost looks as if they hesitated on whether or not to continue or abort, which obviously as most of us know they should've continued. Panic does terrible things to the mind.