Snowmobile track drive shaft The figure shows a drive shaft, supported in a snowmobile frame by bearings A and B, which is chain-driven by sprocket C. (The engine and transmission are above and forward of the shaft; hence, the 30° chain angle.) Track sprockets T1 and T2 drive the snowmobile track. Basic dimensions are given in the figure as well. Determine an appropriate design for the shaft, based on a maximum engine output of 20 kW at a vehicle speed of 72 km/h. Because the track and chain do not impose stringent deflection requirements and the bearings can be self-aligning if necessary, the preliminary design should be based on fatigue strength. - 2500 N) 300 Chain P1000N Track Chain Sprocket 100 diameter Track Track Sprockets a) Snowmobile Track sprocket 250 diameter (H) General arrangement B T2 55 Small gap or spring washer (c) Shaft layout