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Old 17th Apr 2017, 17:10
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applecrumble
 
Join Date: Mar 2017
Location: London
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Flap and slat lock

Heya guys,
So let's say we have a flap or slat lock. Or both.
The pitch attitude on approach is higher (increased angle of attack) and we fly at a higher Approach speed.
If we fly a standard ILS without any failures, then we come down at 700FPM 2.5 degrees for a standard jet transport approach.
With the failure of the high lift devices we fly faster and to stay on the fixed glide path then we select a higher rate of descent to maintain the glide with a high pitch attitude.
My question is, why do we require less flare to arrest the rate of descent. I am aware of the tail strike implications of this failure.
But the FCTM says you will require less flare (understandable for tailstrike risk) but surely to reduce the higher rate of descent then you need a larger pitch increment rather than a smaller one? (Forgetting any tail strike implications)
I'm sure there is something simple I'm missing, but I did get up at 3am so please forgive me!
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