Spearfish speed and the American engine behind it

If you could buy a torpedo, which type would be your first choice?

Spearfish, for its combination of heavyweight striking power and high speed.

Spearfish is favored for its combination of speed and heavyweight striking power. Its Sundstrand gas turbine and pump-jet machinery put American technology inside a British-funded weapon. The engine's American origin can surprise those comparing Spearfish's speed with American torpedoes. An earlier parallel is the qualitative dreadnought race, when Britain, the United States, Japan and Italy exchanged considerable amounts of technology. National competition and technical cooperation could therefore occur at the same time.