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Straight-twin Engines
A straight-twin engine, also known as an inline-twin, vertical-twin, inline-2, or parallel-twin, is a two-cylinder Reciprocating engine, piston engine whose cylinders are arranged in a line along a common crankshaft. Straight-twin engines are primarily used in motorcycles; other uses include automobiles, marine vessels, snowmobiles, personal watercraft, jet skis, all-terrain vehicles, tractors and ultralight aircraft. Various different crankshaft configurations have been used for straight-twin engines, with the most common being 360 degrees, 180 degrees and 270 degrees. Terminology The straight-twin layout is also referred to as "parallel-twin", "vertical-twin" and "inline-twin". Some of these terms originally had specific meanings relating to the crankshaft angle or engine orientation; however, they are often also used interchangeably. In the United Kingdom, the term "parallel-twin" is traditionally used for engines with a crankshaft angle of 360 degrees, since the two pist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rovena 250 1964 - Hispano Villiers Engine
Rovena is a given name and surname. Notable people with the name include: * Rovena Stefa (born 1979), Albanian singer * Rovena Marku, Olympic freestyle swimmer from Albania * Marcella Rovena, Italian film and voice actress See also * ''Cheneya rovena'', a moth in the family Bombycidae RoVena a NGO dedicated to education opportunities for Rohingya refugees {{given name, type=both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yamaha TX750
The TX750 is a two-cylinder standard motorcycle built by Yamaha. The bike was released in 1972. Significant reliability problems affected the engines in early bikes. Yamaha made several changes to solve the problems but the bike was withdrawn from most markets after 1974 and production stopped in the home market after 1975. Chassis and suspension The TX750 had a double-cradle frame of tubular steel. Front suspension was a hydraulically damped telescopic fork with of travel and coil springs with a rate of . There were no gaiters on the standpipes. A vane-type steering damper was fitted. At the rear was a steel swing-arm that rode in plain bearings. Springing and damping were provided by dual shock absorbers and progressively wound coil springs whose rate varied from and provided of travel. The rear-shocks were five-way adjustable units. The TX750 was the first Yamaha road bike to have aluminum wheel rims. The rims were copies of Akront valanced rims made by DID. In Europe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fundamental Frequency
The fundamental frequency, often referred to simply as the ''fundamental'' (abbreviated as 0 or 1 ), is defined as the lowest frequency of a Periodic signal, periodic waveform. In music, the fundamental is the musical pitch (music), pitch of a note that is perceived as the lowest Harmonic series (music)#Partial, partial present. In terms of a superposition of Sine wave, sinusoids, the fundamental frequency is the lowest frequency sinusoidal in the sum of harmonically related frequencies, or the frequency of the difference between adjacent frequencies. In some contexts, the fundamental is usually abbreviated as 0, indicating the lowest frequency Zero-based numbering, counting from zero. In other contexts, it is more common to abbreviate it as 1, the first harmonic. (The second harmonic is then 2 = 2⋅1, etc.) According to Benward and Saker's ''Music: In Theory and Practice'': Explanation All sinusoidal and many non-sinusoidal waveforms repeat exactly over time – they are per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
