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Old 05-21-2012 | 11:16 PM
  #1552  
Zor
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From: Ontario, ON, CANADA
Default RE: Building a Dynaflite Super Decathlon


ORIGINAL: cshahrdar

dear Zor

please explain to me.
When the crosswind is light and its angle to the landing line (like the center line if there is a runway) the model can have a final approach in line with the runway (or intended line of landing) and use side slipping while the nose and landing gear are pointing to the touch down. The nose attitude and the power used do control the rate of descent while side slipping against the crosswind component that is 90 degrees to the line of landing.

The crosswind pushes the model downwind but the side sliping into the wind maintain the ground trajectory as intended.

When the crosswind is strong the model is still approaching in a straight ground line but with its nose pointing into the wind the proper amount to keep the ground trajectory as intended. The wings are kept level during the approach. At the moment of flare out just before the wheels contact the surface rudder and some opposite ailerons are used to bring the wheels in line with the trajectory and it is ok if the upwind wheel touches first. This also avoids the crosswind of picking up the wing on the side the wind comes from. A wheel landing is preferable with a tail dragger if the crosswind is gusty to keep a low angle of attack until the speed has decreased.

It is easier and safer to land a tail dragger in a crosswind than a tricycle. The front wheel of a tricycle does not like misalignment when it contact the surface.

Voila ___a bit of practice can master the technique actually used by pilots of full size airplanes.

Crosswind landings, well executed, are a lot of fun.

Zor