A twin jet Pelton wheel has a mean runner diameter of 1.68 m & runs at 500rpm, each jet is of dia. 152 mm. The net head is 510 m. Bucket turns the jet through 1650 & relative velocity is reduced by 12% when it flows over the bucket. Windage & mechanical losses are 3% of the water power supplied. Nozzle co-efficient = 0.98. Find:
i) Water power supplied. ii) Brake power. iii) Force of each jet on bucket. iv) Overall efficiency.