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MegolaThe Megola was a German motorcycle produced between 1921 and 1925 in Munich. The name was loosely derived from its designers MEixner, COckerell and LAndgraf. The Megola had a unique design that was unseen anywhere else in the motorcycle industry. It boasted a rotary engine mounted within the front wheel. The engine contained five cylinders with side-mounted valves and it displaced 640 cc (39 cu in), a total size equivalent to many modern bikes. The crankshaft was the front axle, which remained stationary while the cylinders rotated with the wheel, an architecture called the Monosoupape design. A hand-controlled butterfly valve was located in the hollow crankshaft to regulate throttle. Power output was a meagre 14 bhp (10 kW) but was applied directly to the wheel. This arrangement produced a very low centre of gravity and provided for excellent handling. The engine was very flexible, lacking both a clutch and a transmission. Starting it required a person to either spin the front wheel while the bike was on its stand, or to push-start. The cylinders could be dissassembled without having to remove the wheel spokes in order to service the engine. The tires were tubed with the front inner-tube being a circular sausage shape rather than a complete doughnut so that it could be changed without removing the wheel and engine. The box section frame contained the main fuel tank which fed by gravity a smaller tank mounted on the axle. The front suspension was comprised of semi-elliptical springs. The top speed was 85 km/h (52 mph) resulting in a win at the German Championship in 1924, while later, sportier models were said to be capable of 140 km/h (88 mph). A total of 2000 Megalos were built and only 10 rideable examples remain, with one existing in the Guggenheim museum in New York, USA.
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