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Academics – Applied Mechanics : 2015/MAR/06
Question

Q9. An intermediate propeller shaft is fitted to an engine of power output 16 MW running at 110 rev/min. The shaft is solid with a coupling flange at each end. Each flange has 12 bolts on a pitch circle diameter of 1.5 times the shaft diameter. The limiting shear stress is 180 MN/m2 for the shaft material and 160 MN/m2 for the bolt material. Calculate EACH of the following:

(a) The diameter of the bolts for a safety coefficient (factor of safety) of 2.

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