For an inside cylinder locomotive with two cranks at right angles, the reciprocating parts are 300 kg per cylinder. The distance between the cylinder centre lines is 0.6 m and between the plane of rotation of wheels 1.5 m. Each crank is 0.3m long and the driving wheels are 1.8 m diameter. Revolving balance masses are introduced in the planes of wheels partially to balance 2/3 rd of the reciprocating parts. Determine the maximum variative of

(a) tractive effort, and

(b) wheel load when the locomotion is running at 90 km/h.