Question: A 250 mm diameter solid propeller shaft has an output of 6 MW. When the forwardspeed of the vessel is 20 knots, the speed

A 250 mm diameter solid propeller shaft has an output of 6 MW. When the forwardspeed of the vessel is 20 knots, the speed of the propeller is 240 rpm. Calculate: (a) The max. shear stress due to the torque produced. (5) (b) The axial compressive stress due to the shaft thrust. (5) (c) Construct a diagram indicating the lines of action on the shaft of the stresses calculated above. (3) (d) For an element on the surface of the shaft find: (1) The principle stresses and the planes on which they act. (6) The max. shear stresses and the planes on which they act. (6)

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