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Both calculate an approximation of the first natural frequency of vibration, which is assumed to be nearly equal to the critical speed of rotation. The Rayleigh–Ritz method is discussed here. For a shaft that is divided into n segments, the first natural frequency for a given beam, in rad/s , can be approximated as:
Engine balance refers to how the inertial forces produced by moving parts in an internal combustion engine or steam engine are neutralised with counterweights and balance shafts, to prevent unpleasant and potentially damaging vibration. The strongest inertial forces occur at crankshaft speed (first-order forces) and balance is mandatory, while ...
A Triumph Sprint ST on a chassis dynamometer Suzuki Hayabusa at Bonneville Speed Week.. Motorcycle testing and measurement includes a range of more than two dozen statistics giving the specifications of the motorcycle, and the actual performance, expressed by such things as the output of the engine, and the top speed or acceleration of the motorcycle.
Harley-Davidson Twin Cam engine at the Harley-Davidson Museum. The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with ...
Motorsport engines often run on high-octane petrol and can therefore use higher compression ratios. For example, motorcycle racing engines can use compression ratios as high as 14.7:1, and it is common to find motorcycles with compression ratios above 12.0:1 designed for 95 or higher octane fuel.
The triple received its first major update in 1997 with a ground up redesign to produce the fuel injected 955 cc (58.3 cu in) T595 Daytona engine, and the 885 cc (54.0 cu in) T509 Speed Triple engine, the latter using the original bore and stroke of the first generation engine. The claimed power outputs for these engines were 128 and 108 bhp ...
The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from 1966 to 1984, built as a successor to the previous Panhead engine. When the engine was first produced, the Shovelhead had a shallower combustion chamber, larger valve drop for both intake and exhaust, better porting, and stronger valves and pistons.
The Bridgestone 350 GTR was a standard motorcycle built by the motorcycle division of Bridgestone from 1967 until 1971. It had an air-cooled 345 cc (21.1 cu in) two-stroke Straight-twin engine, which produced 37 hp (27.6 kW; 37.5 PS) at 7,500 rpm, and could hit a claimed top speed of 95 mph (153 km/h).