Principles of Flightmedium#562
Slipstream (spiraling) effect from a clockwise-rotating propeller (viewed from cockpit) tends to yaw the aircraft:
A
Right
B
Left, due to the spiraling slipstream striking the left side of the vertical fin
CorrectC
Neither direction
D
Upward
Explanation
The slipstream corkscrews around the fuselage and strikes the left side of the vertical fin, creating a yawing moment to the left.
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