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Franklin engines powered numerous light planes (owing to their light weight) as well as most early American-built helicopters. Aircooled Motors, the last company to manufacture air-cooled engines under the Franklin name, declared bankruptcy in 1975. Its designs were sold to the Polish government. Engines based on these designs remain in production.
The original design of utility ATVs was offered from 1996 to 2004 and featured single-cylinder liquid or air-cooled motors from 250 to 500 cc, all of a common design. This Arctic Cat-designed motor was manufactured by Suzuki and featured a 2V SOHC design with hemispherical combustion chambers. Manual and CVT automatic transmissions were offered.
Franklin O-335. The firm began as the H. H. Franklin Co. in 1902 in Syracuse, New York, US, to produce Franklin air-cooled automobiles.Barely surviving bankruptcy in 1933, the company was purchased by a group of ex-employees and renamed Air-cooled Motors in 1937.
Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. Air-cooled designs are far simpler than their liquid-cooled counterparts, which require a separate radiator , coolant reservoir, piping and pumps.
The Classic used an air-cooled twin-rotor Wankel engine that had been developed by David Garside at BSA's Umberslade Hall research facility. [1] [2] [3] Garside, who had been impressed by the air-cooled single-rotor Fichtel & Sachs engine in the Hercules motorcycle, installed a bought-in F&S engine into a BSA B25 'Starfire' frame as a "proof of concept".
Rotax air-cooled, two-stroke engines began appearing on ultralight aircraft in the early 1980s, with a pair of single-cylinder, 9.5-horsepower Rotax 185s [11] [12] powering the single-seat Lazair ultralight by 1982. [12]
A new prototype front-wheel-drive car was built with a 923 cc (56 in 3) water-cooled boxer engine, which became the basis for the Subaru 1000 and the EA-52 boxer engine. The car began sales to the public starting in 1966. [1] The EA series engines have aluminum heads with aluminum blocks.
While air-cooled engines primarily rely on air to regulate temperature, many also use oil cooling to help maintain optimal temperatures for both engine components and the oil itself. Most liquid-cooled engines use some air cooling, with the intake stroke of air cooling the combustion chamber.