#1) A band brake shown in figure below is needed to exert a braking torque of...

 

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#1) A band brake shown in figure below is needed to exert a braking torque of 350 Nm on a drum with 254-mm diameter. The actuating force P (exerted by the operator's foot) should not have to exceed 111 N and the maximum contact pressure is 0.414 MPa. The value for u is 0.31 +0.03. where the value of a = 25.4mm, a = 200 and c = 127mm, corresponding to the drum's radius. P Figure 1. band brake (a) Make sure the brake will not be self-locking for an u value 30 percent above the maximum value. (b) Calculate the band width b to limit the contact pressure. (c) Find the length for the operating lever. (d) For the same actuating force P, what is the braking torque if the drum's rotation is reversed? #1) A band brake shown in figure below is needed to exert a braking torque of 350 Nm on a drum with 254-mm diameter. The actuating force P (exerted by the operator's foot) should not have to exceed 111 N and the maximum contact pressure is 0.414 MPa. The value for u is 0.31 +0.03. where the value of a = 25.4mm, a = 200 and c = 127mm, corresponding to the drum's radius. P Figure 1. band brake (a) Make sure the brake will not be self-locking for an u value 30 percent above the maximum value. (b) Calculate the band width b to limit the contact pressure. (c) Find the length for the operating lever. (d) For the same actuating force P, what is the braking torque if the drum's rotation is reversed?