Pomilio, Ottorino · New York, McGraw-Hill · leaf 88
lades, the diameter, the pitch, the maximum width ofthe blades and their profile. 72 THE PROPELLER 73 Propellers are built with 2, 3, and 4 blades. The typemost commonly used is the 2-blade propeller, especiallywhen quick-firing guns with synchronized devices for firingthrough the propeller, are… … Fig. 60. (devices called synchronizers), which release the projectilesat the instant the propeller blades have passed in front ofthe machine gun muzzle; in other words, the projectileis fired through the plane of rotation of the propeller whenthe blade has rotated by an angle a (Fig. 60). Angle ais…
Airplanes
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