Pomilio, Ottorino · New York, McGraw-Hill · leaf 363
locity U is the resultant of the velocityof rotation r and of velocity of translation V, of the air-plane. The direction of these velocities being at rightangles to each other we shall have [/2 = 0,2 X r2 + F2 348 AIRPLAXE DESIGN AND CONSTRUCTION therefore (IR = K X (co^ Xr- + Y-) XlXdr from which… … Fia. 216. practical approximation K may be kept constant for thevarious sections and equal to an average value which willbe determined. We note that dR being inchned backward by about 4°with respect to the normal to the blade cord, changesdirection from section to section; it will consequently…
Airplanes
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