stopping a DC9 quickly
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Join Date: Jan 2010
Location: melbourne australia
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stopping a DC9 quickly
I met a man who said he had been involved with developing the DC9 and that they couldnt meet a requirment for a fast stop after touchdown.
someone eventually said why not retract the undercarriage and let the plane slide to get extra braking
he said this was written into the flying manual, is this actually correct or just a fable?
someone eventually said why not retract the undercarriage and let the plane slide to get extra braking
he said this was written into the flying manual, is this actually correct or just a fable?
Join Date: Aug 2005
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I could be wrong, but methinks braking tires produce more friction than sliding metal. Safer and better directional control too. Someone is pulling your leg.
and as the Captain states above, you get to use the airplane again.
and as the Captain states above, you get to use the airplane again.
Join Date: Sep 2002
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The only circumstances I can think you'd even consider an intentional wheels-up landing on a runway is with a foreknowledge of complete and utter braking system failure, in which case your choice might be between sliding on the belly or rolling on unbraked wheels. Even then it would seem a dicey choice, given all the damage (and hazard) from the belly landing.
And even if that were the preferred option, you would be landing on the belly, not trying to retract the gear during the roll-out. (Apart from anything else, that kind of complete braking system loss probably means a loss of multiple hydraulics on most aircraft, which might make gear deployment and retraction more doubtful anyway).
It does all sound very unlikely.
And even if that were the preferred option, you would be landing on the belly, not trying to retract the gear during the roll-out. (Apart from anything else, that kind of complete braking system loss probably means a loss of multiple hydraulics on most aircraft, which might make gear deployment and retraction more doubtful anyway).
It does all sound very unlikely.
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One notable exception: the A342 and 343 can't land if one main gear is up and the center gear is down. You're supposed to retract the gear and do a belly landing. The risk of structural damage exceeds the risk of a belly landing.
Is there a similar case on any other plane?
Is there a similar case on any other plane?
