The Super-Swift

Winston Churchill described the super-Swift (as he wrote the name) as having 6-4in guns, 600 tons of oil fuel, and able to make 37 knots. The cost was to be £250,000. The question is how large the type was to be. The super-Swift type would have been built under the 1912 estimates, so we could use the Laforey class destroyers as a guide. The Hotspur cost the most, being £107,800. The Laforey class were designed to be 1112.5 tons. That is a cost of £96.9 per ton of displacement. If the super-Swift cost £250,000, that would be displacement of about 2,580 tons. I had previously guessed a much lower displacement: about 2,250 tons.