The figure shows an internal rim-type brake having an inside rim diameter of 12 in and a dimension R = 5 in. The shoes have a face width of 1 ½ in and are both actuated by a force of 500 lbf. The mean coefficient of friction is 0.28.
(a) Find the maximum pressure and indicate the shoe on which it occurs.
(b) Estimate the braking torque effected by each shoe, and find the total braking torque.
(c) Estimate the resulting hinge-pin reactions.