What position is a constant-speed propeller normally set in for takeoff?

• A. In the HIGH PITCH, LOW RPM position
• B. In the MEDIUM PITCH, MEDIUM RPM position
• C. In the LOW PITCH, HIGH RPM position
• D. In the NEUTRAL PITCH, NEUTRAL RPM position

Answer: (C)

Maximizing takeoff thrust with a constant-speed propeller relies on setting the blades to a low pitch. In a constant-speed system, the governor holds a chosen rotor speed (RPM) and the propeller pitch adjusts to keep that RPM as load changes. For takeoff, you want the engine to turn the propeller as fast as possible, so you use a finer, low pitch. This reduces the blade angle and drag, allowing the engine to reach and maintain a high RPM, which in turn delivers the maximum thrust the propeller can produce. If you were to use a high pitch, the blades bite more air, increasing drag and lowering RPM and thrust, which is not desirable for takeoff. Neutral or medium pitch wouldn’t provide the peak thrust needed for a strong takeoff.