Resultant Load on the Gudge:

A single cylinder vertical engine contains a bore 35 cm and a stroke of 40 cm. The connecting rod is equal to 110 cm long. Mass of reciprocating parts is equal to 140 kg. At the expansion stroke along the crank at 30^o from the TDC, the gas pressure is equal to 0.8 MPa. If engine runs at 260 rpm, find Resultant Load on the Gudge and Thrust on Cylinder Walls.

Resultant Load on the Gudgeon Pin

                     Q =         P/ cos φ

sin φ= (sin θ)/n = (sin 30^o)/5.5

or         φ= 5.216^o

∴          Q = 58475/ cos 5.216^o = 58718 N

 Thrust on Cylinder Walls

N = P tan φ

        = 58475 tan 5.216

         = 5338 N