Pilot Institute

JUNE 4, 2025

This article will explain what a constant speed propeller is, how it works, and how to use it correctly in the cockpit so that you can use the variable-pitch system with confidence. Key Takeaways Constant-speed props hold RPM by adjusting blade pitch. It senses changes in engine RPM and adjusts oil pressure to change the blade angle.

Blade Angle 80

Blade Angle Torque Pilot Cockpit 80

Pilot Institute

JUNE 12, 2025

With a variable-pitch propeller, the pilot can adjust the propeller’s pitch using a control in the cockpit. Pitch affects how much the propeller blade bites into the air to force it backward. Many variable pitch propellers can have their blade angle decreased past zero to a negative angle. What does this mean?

Thrust 52

Thrust Blade Angle Runway Pilot 52

Pilot Institute

JANUARY 21, 2025

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.

Blade Angle 52

Blade Angle Pilot Descent Operating Limitations 52

Vintage Aviation News

APRIL 15, 2025

The name “Hydromatic” was a Hamilton Standard patented product name, which described the method by which the blade angle was altered. The forward and aft movement of this through a moving cam changed the blade angles through serrations at the butt of each blade.

Blade Angle 98

Blade Angle Hangar Runway Cockpit 98