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.
Breakaway torque is defined as the torque required to start a partâs rotation from a stationary position. It is usually a higher value compared to the maximum tightening torque value as per specification .
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).