Ab Jenkins Ab Jenkins David Abbott "Ab" Jenkins (January 25, 1883 – August 9, 1956) was the 24th mayor of Salt Lake City, Utah from 1940 to 1944 and was a professional race car driver. Jenkins' interest in motorsports began with racing motorcycles on dirt tracks and cross country. He then became interested in land speed records at the Bonneville Salt Flats. He was instrumental in establishing Bonneville as a location for such events, and in attracting overseas drivers such as George Eyston and Sir Malcolm Campbell to compete there. He drove the Duesenberg "Mormon Meteor" to a 24-hour average land speed
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