This is the third part of a 4 part series.
All applications of a gyroscope are based on two fundamental properties : rigidity in space and precession. We are only interested in precession for this discussion.
Precession is the resultant action of a spinning rotor when a deflecting force is applied to its rim.
Any time a force is applied to deflect a propeller, the resulting force is 90 degrees ahead of and in the direction of the rotation, causing a pitching moment, a yawing moment, or any combination of the two.
It is said that, as a result of this action, any yawing around the vertical axis results in a pitching moment, and any pitching around the lateral axis results in a yawing moment.
To correct for the gyroscopic action effect, it is necessary for the pilot to properly use elevator and rudder to prevent undesired pitching and yawing.
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