The crank pin circle radius of a horizontal engine is 300 mm. The mass of the reciprocating parts is 250 kg. When the crank has travelled 600 from inner dead centre, the difference between the driving and back pressure is 0.35 N/mm2.
The connecting rod length between centres is 1.2 m. and the cylinder bore is 0.5 m. If the engine runs at 250 rpm and if the effect of piston rod diameter is neglected,
calculate: (i) pressure on side bars (ii) thrust in the connecting rod (iii) tangential force on the crank pin and (iv) turning moment on the crank shaft.