What can the universal propeller protractor be used to measure?

The universal propeller protractor is primarily designed to measure the angle of components related to propeller systems, including flap travel in degrees. This measurement is crucial in flight operations, as accurate flap positioning is essential for optimal aerodynamic performance during various phases of flight, such as takeoff and landing.

The protractor helps pilots and technicians quantify how far flaps are extended, which directly influences lift and drag characteristics. While options such as measuring engine RPM, throttle position percentages, or the angle of the propeller blade involve different instruments or systems, the universal propeller protractor specifically focuses on measuring angles associated with the flaps' deployment and positioning. This distinction highlights the tool's application in ensuring proper flight configurations.