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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. This means pilots can modify the RPM independently of the MP to some extent. What Is RPM?

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The Smith Family de Havilland Mosquito and its link to RAF East Fortune

Vintage Aviation News

60 Operational Training Unit, a night fighter training unit that saw hundreds of keen young pilots and gunners learn the art of night fighting on the Boulton Paul Defiant two-seat turret fighter. The name “Hydromatic” was a Hamilton Standard patented product name, which described the method by which the blade angle was altered.