A propeller whose blade pitch can be adjusted during flight is a

A propeller whose blade pitch can be adjusted during flight is a

• A. Fixed Pitch Propeller
• B. Variable Pitch Propeller
• C. Feathered Propeller
• D. Constant Speed Propeller

Answer: (B)

Adjusting blade pitch during flight lets the engine and airframe work most efficiently across different speeds and conditions by changing the angle of the blades to control thrust. A fixed-pitch propeller has a single blade angle set on the ground and cannot adapt, so its performance can be suboptimal as flight conditions change. A propeller whose blade pitch can be adjusted in flight lets you dial in a finer pitch for takeoff and climb when you need more thrust, or a coarser pitch for cruise to reduce drag and keep speed with less engine effort. A feathered propeller is set to a high pitch to minimize drag when the engine isn’t producing thrust, not for normal thrust control. A constant-speed propeller also changes pitch to maintain a chosen engine RPM, but its defining feature is automatic RPM control rather than manual pitch changes; the basic idea of being able to vary pitch in flight aligns with the variable-pitch concept.

Adjusting blade pitch during flight lets the engine and airframe work most efficiently across different speeds and conditions by changing the angle of the blades to control thrust. A fixed-pitch propeller has a single blade angle set on the ground and cannot adapt, so its performance can be suboptimal as flight conditions change. A propeller whose blade pitch can be adjusted in flight lets you dial in a finer pitch for takeoff and climb when you need more thrust, or a coarser pitch for cruise to reduce drag and keep speed with less engine effort. A feathered propeller is set to a high pitch to minimize drag when the engine isn’t producing thrust, not for normal thrust control. A constant-speed propeller also changes pitch to maintain a chosen engine RPM, but its defining feature is automatic RPM control rather than manual pitch changes; the basic idea of being able to vary pitch in flight aligns with the variable-pitch concept.