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1 Answers

ASI changes with Flap retraction.

Asked by: 1628 views Aerodynamics

Hello guys.

 

Right after flap retraction to low, what phenomena does occur on ASI and attitude?

I know A/S is going to be increase but this is no my point.

thanks

 

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1 Answers



  1. Mitchell L Williams on Oct 14, 2014

    Airspeed and attitude changes with flap setting are airplane specific: High wing or low wing, type of flaps: Plain, split, fowler etc.

    In general, on a high wing airplane:
    – the reduced flap drag (extended to retracted) will cause the nose to pitch down.
    – if a fowler flap,the center of lift would move forward and cause pitch up.
    – The reduced drag will add to airspeed. The net effect to airspeed may be none or increase.

    Low wing:
    – the reduced flap drag (extended to retracted) will cause the nose to pitch up.
    – if slotted flaps,the center of lift would move forward and cause pitch up.
    – The reduced drag will add to airspeed. The net effect to airspeed may be none or decrease.

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