Question

The maximum braking torque acting on a band and block brake
is 8950 Nm. The band is lined with 12 blocks each of which
subtends an angle of 15º at the center of the rotating drum. The
diameter of the drum is 850 mm and thickness of the blocks is
75 mm. Find the least force required at the end of the lever,
which is 500 mm long as shown in figure. Take μ = 0.4.

Answer 1