121. The thrust of a propeller shaft in a marine engine is taken up by a number of collars integral with the shaft which is 300 mm in diameter. The thrust on the shaft is 200 kN and the speed is 75...

e in a marine engine is taken up by a 300 mm in diameter: The thrust on the shaft is 20( equal t0 0.05 and assuming intensiry of press diameter of the collars and th, 16 kW, e number of


Extracted text: 121. The thrust of a propeller shaft in a marine engine is taken up by a number of collars integral with the shaft which is 300 mm in diameter. The thrust on the shaft is 200 kN and the speed is 75 r.p.m. Taking H constant and equal to 0.05 and assuming intensity of pressure as uniform and equal to 0.3 N/mm, find the external diameter of the collars and the number of collars required, if the power lost in friction is not to exceed 16 kW.