A steel propeller shaft is to transmit 4.5 MW at 3 Hz without exceeding a shearing stress of 50 MPa or twisting through more than 1° in a length of 26 diameters. Compute the proper diameter if G = 83 GPa.
Based on maximum allowable shearing stress:
Based on maximum allowable angle of twist:
Use the larger diameter, thus, d = 352 mm. answer