Friday, February 13, 2009

Takeoff Roll - Ground Effect On Takeoff

Taking off from a short field requires the takeoff to be
started from the very beginning of the takeoff area. At
this point, the airplane is aligned with the intended
takeoff path. If the airplane manufacturer recommends
the use of flaps, they should be extended the proper
amount before starting the takeoff roll. This permits
the pilot to give full attention to the proper technique
and the airplane's performance throughout the takeoff.

Some authorities prefer to hold the brakes until the
maximum obtainable engine r.p.m. is achieved before
allowing the airplane to begin its takeoff run. However,
it has not been established that this procedure will
result in a shorter takeoff run in all light single-engine
airplanes. Takeoff power should be applied smoothly
and continuously—without hesitation—to accelerate
the airplane as rapidly as possible. The airplane should
be allowed to roll with its full weight on the main
wheels and accelerated to the lift-off speed. As the
takeoff roll progresses, the airplane's pitch attitude and
angle of attack should be adjusted to that which results
in the minimum amount of drag and the quickest acceleration. In nosewheel-type airplanes, this will involve
little use of the elevator control, since the airplane is
already in a low drag attitude.

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