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Old Jan 01, 2006, 09:32 PM
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Palmdale, CA
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The three motions of a plane are:
Pitch... around an axis extending out the wing.. Vertical rotation around that axis is usually controlled by the elevator.
Roll... rotational motion around a line going from nose to tail, generally along the center of the fuselage. Usually controlled by the ailerons.
Yaw... rotational motion around a vertical axis extending up and down thru the airplane's center of mass. Usually controlled by the rudder.
The rudder when used as the turning control relies on the wing's dihedral to achieve the change in the roll axis which moves the nose around in a turn due to the imbalance of forces on the dihedralled wing.
With no dihedral, rudders tend to be ineffective.
Ailerons turn the plane by creating an unbalance of forces around the longitudinal axis.. more on one side, less on the other.. the airplane turns toward the side with the lesser force.
Due to the force setups in the other axes, the plane turns as well as rolls.
Ailerons tend to be the primary flight control for most models..
Rudders tend to ineffective with most planes at speed, so these are considered secondary flight controls.
drawings to follow:
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Last edited by Sparky Paul; Jan 03, 2006 at 12:09 PM.
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