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Old 22nd September 2010 | 09:15
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manucordier
 
Joined: Aug 2010
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From: Brussels
Downhill slope and Maximum mass for take-off

Hi,

This is a performance question:

If the take-off mass of an aeroplane is tyre speed limited, downhill slope would:

Answer: has no effect on the maximum mass for take off (according to FlyAround).

Well, I would have said that with a downhill slope you will accelerate to V1 faster, thus reaching V1 in a smaller distance which should allow you to take-off with a higher weight than with a zero slope runway.

Moreover in case of engine failure before V1, you will have more runway to stop the aircraft (... I understand that because of the downslope you will need a greater distance to stop the airplane but you do have that greater distance because V1 was reached sooner).

Who can explain the FlyAround given answer ?

Thanks,
Emmanuel Cordier.
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