Crusader was a jet-powered speed boat piloted by John Cobb. The combination of an aerodynamically stable hullform and turbojet propulsion was proposed by Reid Railton, Cobb's adviser. A rocket-powered scale model was tested at Haslar. The full size design was by Peter du Cane and built by Vospers of Portsmouth. Technical assistance came from Saunders-Roe and Vickers-Supermarine. It cost £15,000 in 1949. Expectation was that the boat could achieve more than 200 mph (320 km/h). The boat was destroyed and Cobb killed on 29 September 1952 when on a world record attempt at Loch Ness, Scotland.