Mast Bumping

Question 1

Forcing the rotor system to flap near its maximum tilt of approximately ___

Answer 1

11°

Question 2

Slope operations nearing approximately _______

Answer 2

10° of bank

Question 3

Indications of Mast Bumping

Answer 3

1. Two/rev vibration of main rotor
2. During low- and/or negative-G maneuvers, aircraft nose usually pitches downward.
3. Physical contact between flap stops and mast

Question 4

Any time a near maximum cyclic displacement is made, the teetering rotor system is forced to flap near its maximum tilt of approximately__________.

Answer 4

11°

Question 5

Sources of mast bumping stem from situations where large cyclic inputs are made in conjunction with a __________.

Answer 5

low-loaded (low-G) rotor system

Question 6

What is an example of a low- or negative-G maneuver?

Answer 6

Ridgeline crossings during low-level flight