Question

Which way do the props spin on a conventional twin?

1) Clockwise
2) Counterclockwise
3) They don't spin
4) Cannot be determined

Answer 1

In a conventional twin-engine airplane, the propellers spin in opposing directions to balance torque effects. The right propeller spins clockwise, and the left propeller spins counter-clockwise as viewed from the pilot's seat.

Step-by-step explanation:

The question asks about the rotation of propellers on a conventional twin-engine airplane. In a conventional twin-engine aircraft, the props are designed to counteract the torque and P-factor which would otherwise cause the plane to veer to one side. They typically spin in opposing directions for this reason. On most common designs, the right engine propeller spins clockwise, and the left engine propeller spins counter-clockwise as viewed from the pilot's seat or rear of the airplane, this is sometimes referred to as 'critical engine' design.

The answer to the question is both 1) Clockwise and 2) Counterclockwise because each propeller spins in one of these directions depending on which side of the aircraft it is located.