The engine of a ship develops 640 kW and transmits the power by a horizontal propeller shaft which runs at 160 r.p.m. It is proposed to design a hollow propeller shaft with inner diameter as 0.5 of the outer diameter. Considering the torsion alone calculate the diameter of the propeller shaft if stress in the material is not to exceed 65 N/mm2 and also the angular twist over a length of 2.5 m is not to be more than 10. The modulus of rigidity of the shaft material is 60 kN/mm2.
The engine of a ship develops 640 kW and transmits the power by a horizontal propeller shaft which runs at 160 r.p.m. It is proposed to design a hollow propeller shaft with inner diameter as 0.5 of the outer diameter. Considering the torsion alone calculate the diameter of the propeller shaft if stress in the material is not to exceed 65 N/mm2 and also the angular twist over a length of 2.5 m is not to be more than 10. The modulus of rigidity of the shaft material is 60 kN/mm2.
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The engine of a ship develops 640 kW and transmits the power by a horizontal propeller shaft which runs at 160 r.p.m. It is proposed to design a hollow propeller shaft with inner diameter as 0.5 of the outer diameter. Considering the torsion alone calculate the diameter of the propeller shaft if stress in the material is not to exceed 65 N/mm2 and also the angular twist over a length of 2.5 m is not to be more than 10. The modulus of rigidity of the shaft material is 60 kN/mm2.
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