A fluid coupling has a mean diameter at inlet equal to 0.6 of the mean diameter at outlet which is 0.38m. The efficiency of the coupling is 96.5 per cent and the specific gravity of the oil used is 0.85. Assuming that the crosssectional area of the flow passage is constant and equal to 0.026 m 2 and that the loss round the fluid circuit is four times the mean velocity head, calculate the power transmitted by the coupling from an engine running at 2400 rev min-1.