This patient had a recurvatum problem at the knee; so, the posterior shell might have been given to this patient to gain some time until the patient's knee flexors became stronger.
Apply torque to a bolt head only when a torque wrench cannot be used on the nut. After application of torque to a nut, further tightening to align the slot for cotter pin or lockwire is permitted. a. Torque Definitions. Torque definitions are explained In the following paragraphs. (1) Breakaway torque Breakaway torque (table 2-8) is defined as minimum torque required to start the movement of a nut on or off bolt with no axial load on the nut and with the bolt completely through the nut. (2) Friction torque (tare, drag, run on).
Torque demand, expressed in foot-pounds, is the result of force (line pull) x radius (distance from the drum axis to the outer layer of wire rope). If the line pull remains the same, and the number of layers on the drum increases, the torque required to lift the load (torque demand) increases. For example, assume the line pull resulting from a load on the hook is 16,000 pounds. The radius to the first layer of wire rope is 25-l/2â³ -:- 2, or 12-3/4â³. Torque required to rotate the drum, equals 17,000 foot pounds (i.e., 16,000 x 12.75 -:- 12).