03/ The manually - operated hoist shown in figure (13) is based on an epicyclic gear train. The sun wheel, S, is rigidly connected by shaft X to the handle, and the planet carrier, C, is rigidly connected by shaft Y to the winding drum. The annulus, A, is fixed. If the annulus is to have 90 teeth, determine the number of teeth on the sun and planet wheels so that the tangential force on the handle is approximately 25 times less than the load being lifted 0.3m 0.2m figure (13) A (fixed)

400 mm Fr= 800 150mm C 600 N -Fa = 400 150mm Ft = Draw bending torsional moments, shear forces and normal force diagrams for the given gear shaft system.

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5. For the engine-transmission-propeller problem shown below, The engine generates a torque of 219lb-ft, and it is bolted to a frame at locations A and B. The transmission reverses the rotation direction. The transmission ratio is 1.5 (i.e. the propeller speed is -1/1.5 the engine speed, the minus sign indicates the change in direction). d. Sketch the free body diagram. Be sure to show the torques at the input and outputs to the different components. Note the change in the rotation direction between the engine and shaft. e. Solve for the reaction forces at the bolt supports of the engine, if the distance between them is 1 ft. Propeller Engine Reduction ratio 1.5 Engine is attached B