Mechanical Design : materials, beams and structures, latches, locks, and fastenings, springs, power transmission elements and mechanisms, drives and controls, design data on production methods, length of material for 90-deg, moment of inertia of a prism about the axis, determining centrifugal force, forces in toggle joint with equal arms, mean cooling temperature, beams and structures, allowable stresses for chord sections, smooth skin with reinforcing stringers, stresses in cantilever beams, rectangular moments of inertia and section moduli, locking devices, retaining and locking detents, wire locks and snap rings, winding connection diagrams for multispeed motors, multispeed motors, variable torque, key diagrams.