Find the magnitude and direction (with respect to the paper) of the torque: (iv) units of torque are (ft-lb). (a) if the point of rotation is at the shoulder. (b) if the point of rotation is at the elborw

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.