Propeller reverse spins?

Propeller reverse spins?

• A. Counterclockwise 1 1/8 times
• B. Clockwise 1 1/8 times
• C. Clockwise 1/4 times
• D. Counterclockwise 1/4 times

Answer: (B)

Understanding how a propeller reversal mechanism works, including the direction of rotation when reverse is engaged and the precise amount of rotation needed to lock the reverse gears, is what this item is about. In this system, switching to reverse causes the gear train to drive the propeller in the opposite direction from its forward spin. The design requires about one full rotation plus a little more (1 1/8 turns) for the locking detents to align and fully engage reverse, so the propeller ends up spinning clockwise when viewed from the pilot’s seat. That specific 1 1/8-turn requirement ensures the reverse gear properly engages. The other options would imply the wrong rotation direction or an incorrect rotation amount that wouldn’t properly engage the reverse mechanism.

Understanding how a propeller reversal mechanism works, including the direction of rotation when reverse is engaged and the precise amount of rotation needed to lock the reverse gears, is what this item is about. In this system, switching to reverse causes the gear train to drive the propeller in the opposite direction from its forward spin. The design requires about one full rotation plus a little more (1 1/8 turns) for the locking detents to align and fully engage reverse, so the propeller ends up spinning clockwise when viewed from the pilot’s seat. That specific 1 1/8-turn requirement ensures the reverse gear properly engages. The other options would imply the wrong rotation direction or an incorrect rotation amount that wouldn’t properly engage the reverse mechanism.