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All Franklin cars were air-cooled, which the company considered simpler and more reliable than water cooling, and the company considered light weight to be critical in making a well-performing car given the limited power of the engines then available. Most Franklins were wood-framed, though the very first used an angle iron frame (1902) and ...
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.
Small limited production of experimental automobiles began in 1902, with an air-cooled V-twin engine. An air-cooled V4 followed the next year, with pioneering V6 and V8 engines tried over the next few years, before more conventional straight engine designs were settled upon. Marmons soon gained a reputation as reliable, speedy upscale cars.
Chester was a race pilot who had a reputation for getting the most horses out of his four-cylinder Menasco, and keeping it reliable at the same time. A new engine was introduced in 1937: the six-cylinder C6S-4 model, rated at 400 hp at 3300 rpm and 70 in of manifold pressure.
Rotax is the brand name for a range of internal combustion engines developed and manufactured by the Austrian company BRP-Rotax GmbH & Co KG [1] (until 2016 BRP-Powertrain GmbH & Co. KG), in turn owned by the Canadian Bombardier Recreational Products (BRP). Under the Rotax brand, the company is one of the world's largest producers of light ...
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Its most successful post-war products were a series of air-cooled flat-4 and flat-6 general aviation engines. Most famous among these are the O-320 and O-360 four-cylinder engines, and the O-540 six-cylinder engine. [21] [22] Many light aircraft are powered by versions of these engines, with power ratings in the 100–360 hp (75–270 kW) range.