Donald Campbell guise of Dunlop, BP, Smiths Industries and Lucas Automotive,Rubery Owen as well as many others, became heavily involved in the project to build the most advanced car the world had yet seen. CN7 was powered by a specially modified Bristol-Siddeley Proteus free-turbine engine of driving all four wheels. Bluebird CN7 was designed to achieve 475–500 mph and was completed by the spring of 1960. Following low-speed tests conducted at the Goodwood motor racing circuit in Sussex, in July, the "CN7" was taken to the Bonneville Salt Flats in Utah, USA, scene of his father's last LSR triumph, some 25 years
Triumph Model H Model H was fitted with a 499 cc air-cooled four-stroke single-cylinder engine. It was also the first Triumph not to be fitted with pedals, so was a true motorcycle. Engine differences from the previous Model A included a single cam wheel with two cams replacing separate cam wheels for the inlet and exhaust valve, and new design of cylinder casting. Valve head diameter was enlarged and the valves were spaced further apart. The Model H was fitted with a Sturmey-Archer three-speed countershaft gearbox operated by a hand gear change lever. More than 30,000 Triumph Model H motorcycles had been produced