Question: Figure below illustrates an external drum brake system that utilizes a lever mechanism to apply forces on two identical shoes as shown. The shoes have

Figure below illustrates an external drum brake system that utilizes a lever mechanism to apply forces on two identical shoes as shown. The shoes have a uniform face width of 80 mm. Your task is to design the brake system while considering the following specified design constraints: - The drum is allowed to rotate only in the clockwise direction, as depicted. - The length of the drum is limited to a maximum of 100mm. - The brake shoes are to be manufactured using molded lining friction material with f=0.47 and pa=1000kPa. - A load factor of 1.25 is recommended for all design calculations. Figure: a) Double external drum brake. b) Forces acting on shoes. All dimensions are given in mm. Answer the following: a) Which of the shoes is self-energizing? b) Find the frictional and normal moments for the self-energizing shoe. c) Find the maximum actuating force considering the self-energizing shoe. d) Find the maximum lever force (F) based on the recommended load factor against slipping

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