A propeller protractor is a necessary device for any plane mechanic. It’s used to measure the pitch of a propeller, which is the angle at which the blades are set relative to the hub. The pitch of a propeller is crucial to its efficiency, because it impacts the quantity of thrust that the propeller produces. A propeller protractor will also be used to measure the diameter of a propeller, and to verify the alignment of the blades.
Propeller protractors are usually fabricated from aluminum or plastic, and so they have a graduated scale that’s used to measure the pitch of the propeller. The protractor is positioned on the sting of the propeller blade, and the angle of the blade is measured relative to the protractor’s scale. Propeller protractors can be found in quite a lot of sizes, and so they can be utilized on propellers of every type. Some propeller protractors even have a built-in stage, which can be utilized to verify the alignment of the propeller blades.
