Exam Question

(a) Derive the Admiralty Coefficient formula and show how this may be modified to suit a fast Ship (6)

(b) A 6m model of a ship has a wetted surface area of 7m2 and when towed in fresh water at 3knots, has a total resistance of 35N. Calculate the effective power of the ship, 120m long, at as corresponding speed.

n= 1.825. f from formula SCF =1.15. (10)