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Old 07-04-2010, 12:22 PM
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Lnewqban
 
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Default RE: Newie - looking for some explanations

No, the right thrust is to compensate for the P-factor:

http://en.wikipedia.org/wiki/P-factor

Torque tries to roll the model to the left, and there is no built-in compensation for that.
That twisting force, which is stronger during acceleration, must be compensated by ailerons input.

P-factor tries to yaw the model to the left.
Raising the tail during take-off produces gyroscopic precession, which is an additional force that also tries to yaw the model to the left.

The right thrust creates a force (a component of the prop thrust) that tries to yaw the model to the right, while the other two forces are acting in the opposite direction.

Yes, the trick is used in full scale for the same reasons.

You can find a more detailed explanation and good diagrams here:

http://www.americanflyers.net/aviati.../chapter_4.htm
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