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1290 - PPL(H) Exam Question Bank - What aerodynamic effect is most relevant? Rotor RPM starts to decay in autorotation.

Question 1290 - Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

The altimeter setting becomes invalid.
The magnetic compass becomes the primary lift source.
collective should be managed to recover RPM.
The aircraft mass automatically decreases.

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