The band brake in Fig. 1 is to absorb 6 hp at 150 rpm. The maximum pressure between lining...

The band brake in Fig. 1 is to absorb 6 hp at 150 rpm. The maximum pressure between lining and drum is 100 psi. The width of the band is 2 in. and μ = 0.12. Find the angle of wrap α and the distance a.

Figure 1