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Question: exercise quesi ons from ugural fi a co n1 2...

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EXERCISE QUESI ONS from Ugural Fi A CO n1 2 FIGURE P13.4 13.6 A timing belt similar to that shown in Figure P13.4 having 0.05 lb/in. weight is used to transfer power from an engine to a grinding wheel. The largest permissible force in the belt equals Fi 500 lb, and both engine and wheel rotate at the same speed of n 4200 rpm. What is the optimum pulley pitch radius r for largest power transfer? Hint: maximum power, P V(F Fo), transfer occurs when aP/a 0, where Fc is the centrifugal force.

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