the late 1930s and this continued during the war. Main article : Godiva Fire Pumps. Another diversification was into commercial vehicle engines. This started in 1929 with the launch of a large (5.8 litre) six-cylinder side-valve petrol engine intended for buses and trucks, and was followed in 1931 by a six-cylindered 6.8 litre petrol engine of inlet over exhaust (IOE) design, and a 4-cylinder engine in 1932. In 1934 Commercial Motor referred to the 'popular Coventry Climax engines' as the six-cylindered L6 and the four-cylindered B4 – the latter being of 'especially modern design with wet liners'. Examples of vehicles using the engines include the 1932 Karrier Bantam refuse truck, and the 1935 Gilford Motors CF176 coach. Going into the war, Coventry Climax used their marine diesel experience to further develop and build the Armstrong Whitworth supercharged H30 multifuel engine for military use. This has been fitted as an auxiliary engine in the British Chieftain and Challenger battle tanks and Rapier anti-aircraft missile systems. Post WW2 In the late 1940s, the company shifted away from automobile engines and into other markets, including marine diesels, and forklift trucks – plus continuing to make their very successful fire pumps. In 1946, the ET199 forklift was announced, which the company claimed was the first British-produced forklift truck. The ET199 was designed to carry a load with a load centre, and with a lift height. In 1950, Harry Mundy joined Coventry Climax, and a new lightweight all-aluminium overhead camshaft engine was developed in response to the government's ambitious requisition outline asking for a portable fire pump that was capable of pumping double the amount of water specified in the previous outline, with half the weight. This was designated the FW for "Feather Weight". The engine was displayed at the Motor Show in London and attracted attention from the motor racing fraternity for its very high "horsepower per pound of weight". With strong persuasions at the show, including those by Cyril Kieft (who had Stirling Moss as an F3 driver) and a young Colin Chapman, Lee concluded that success in competition could lead to more customers for the company, and so the team designed the FWA, a Feather Weight engine for Automobiles. The first Coventry Climax racing engine appeared at the 1954 24 Hours of Le Mans in the front of one of two Kieft 1100 sports racers, but both cars (one with an MG