Pitch is defined as what in relation to the propeller?

Pitch is defined as what in relation to the propeller?

• A. The distance the propeller would advance longitudinally in one revolution if there were no slip
• B. The diameter of the propeller
• C. The angle of attack of the blade
• D. The rotational speed of the propeller

Answer: (A)

Pitch is the distance along the propeller’s axis that would be advanced in one complete revolution if there were no slip. It reflects the blade geometry: how far the propeller would push the craft forward per turn in an ideal, frictionless medium. In reality, slip occurs, so the actual advance per revolution is less than the pitch. This concept is independent of how fast the propeller spins, since rpm affects actual speed, not the defined pitch. The other ideas describe something different: diameter is the size of the propeller, angle of attack is the blade’s orientation to the flow, and rotational speed is how quickly the propeller turns.

Pitch is the distance along the propeller’s axis that would be advanced in one complete revolution if there were no slip. It reflects the blade geometry: how far the propeller would push the craft forward per turn in an ideal, frictionless medium. In reality, slip occurs, so the actual advance per revolution is less than the pitch. This concept is independent of how fast the propeller spins, since rpm affects actual speed, not the defined pitch. The other ideas describe something different: diameter is the size of the propeller, angle of attack is the blade’s orientation to the flow, and rotational speed is how quickly the propeller turns.