Design a plain carbon steel Centre crankshaft for a single-acting four-stroke single-cylinder engine for the following data: 

Bore = 400 mm; Stroke = 600 mm; 

Engine speed = 200 rp.m.; 

Mean effective pressure = 0.5 N/mm²: 

Maximum combustion pressure = 2.5 N/mm²: 

Weight of flywheel used as a pulley = 50 kN; 

Total belt pull = 6.5 kN. 

When the crank has turned through 35° from the top dead center, the pressure on the piston is IN/mmº and the torque on the crank is maximum. The ratio of the connecting rod length to the crank radius is 5. Assume any other data required for the design.