If the tension on the propeller governor control spring or speeder spring is increased, what happens to blade angle and RPM?

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Study for the Aviation Institute of Maintenance Block 16 Exam. Enhance your knowledge with flashcards and multiple choice questions with hints and explanations. Achieve exam readiness and boost your chances of success!

Multiple Choice

If the tension on the propeller governor control spring or speeder spring is increased, what happens to blade angle and RPM?

Explanation:
The governor balances centrifugal force from the flyweights against the force of the speeder spring to position the blade via the control linkage. Increasing the tension on the speeder spring makes it harder for the weights to move the sleeve to a given position. That means, for the same rotor speed, the sleeve (and thus the blade) sits at a smaller angle. To reach the previous blade angle, you must spin faster, so the operating RPM rises. In short, the blade angle decreases while the RPM increases.

The governor balances centrifugal force from the flyweights against the force of the speeder spring to position the blade via the control linkage. Increasing the tension on the speeder spring makes it harder for the weights to move the sleeve to a given position. That means, for the same rotor speed, the sleeve (and thus the blade) sits at a smaller angle. To reach the previous blade angle, you must spin faster, so the operating RPM rises. In short, the blade angle decreases while the RPM increases.

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