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How Does a Constant-Speed Propeller Work?

Pilot Institute

When the pitch lever is moved back, the propeller pitch angle becomes coarse (the opposite is called fine), and the propeller takes a larger slice of air by increasing the blades angle of attack. When the propellers angle of attack increases, the engines torque increases, which effectively slows down the engines components.

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Manifold Pressure vs. RPM: What’s the Difference?

Pilot Institute

The pitch lever (blue lever) adjusts the propeller blade angle to control RPM. Fixed Pitch Propeller With these propellers, the blade angle remains constant and cannot be adjusted during flight. RPM shows how fast the engines crankshaft and propeller spin. Increase the throttle, and both the MP and RPM rise. What Is RPM?