Which control input counteracts nose-up pitch caused by flap blowback?

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Prepare for the Theory of Rotary Wing Flight Test. Sharpen your skills with flashcards and multiple choice questions, with hints and explanations for each. Ace your exam with confidence!

Multiple Choice

Which control input counteracts nose-up pitch caused by flap blowback?

Explanation:
When flap blowback creates a nose-up tendency, the rotor disk must be tilted forward to re-establish the original attitude. Applying additional forward cyclic accomplishes this by tilting the rotor plane forward, which moves the lift vector ahead of the center of gravity and produces a nose-down moment to cancel the nose-up pitch. Throttle changes affect engine power, not the immediate pitch attitude. Aft cyclic would tilt the rotor backward and worsen the nose-up tendency, and left pedal changes yaw, not pitch. So, the correct input is additional forward cyclic.

When flap blowback creates a nose-up tendency, the rotor disk must be tilted forward to re-establish the original attitude. Applying additional forward cyclic accomplishes this by tilting the rotor plane forward, which moves the lift vector ahead of the center of gravity and produces a nose-down moment to cancel the nose-up pitch. Throttle changes affect engine power, not the immediate pitch attitude. Aft cyclic would tilt the rotor backward and worsen the nose-up tendency, and left pedal changes yaw, not pitch. So, the correct input is additional forward cyclic.

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