Pomilio, Ottorino · New York, McGraw-Hill · leaf 89
vely^ uponthe power the propeller has to absorb, and upon itsnumber of revolutions. The pitch of the propeller, from an aerodynamical pointof view, should be defined as the distance by which thepropeller must advance for every revolution in order that thetraction be zero.^^ In practice, however,… … Fig. 62. the axis XX (Fig. 62), the pitch of the propeller at thatsection will be p = 2-Kr tang 6 Practically, propellers are made with either a constantpitch for all sections, or a more or less variable one. Figs.63 and 64 illustrate respectively, two examples of propellers,one with constant…
Airplanes
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