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Triumph Rocket III : ウィキペディア英語版
Triumph Rocket III

The Triumph Rocket III is a three cylinder motorcycle made by Triumph Motorcycles Ltd. At it had the largest displacement engine of any mass production motorcycle, .〔(【引用サイトリンク】title=2010 Triumph Rocket III Roadster / Touring )
The name "Rocket III" is derived from the 1968 BSA motorcycle, the Rocket 3, which was also produced as the "Triumph Trident."
==History==
The Rocket III Project started in 1998 led by Triumph Product Range Manager Ross Clifford and started with a lot of research – especially in the USA where big cruisers were selling well.〔(Motorcycle Industry Council 1998 )〕 The main competitors were the Harley-Davidson Ultraglide and the Honda Goldwing so the initial idea was to develop a 1,600 cc performance cruiser.
The in-house designer was John Mockett,〔(moto-sprocket-gp (john mockett design and illustration) )〕
designer of the Hesketh V1000, the Tiger and the new 'nostalgia' Bonneville. He started work with David Stride, Gareth Davies and Rod Scivyer working around an in-line three cylinder engine. At the start of the project in-line four and a V6 engine configurations were looked at but the longitudinally mounted triple design led to the design concept code named C15XB Series S1.
Mockett experimented with 'futuristic' styling that included "raygun" mufflers and a large chrome rear mudguard, but consumer focus groups did not like it. The S2 model was a simplified version with a more traditional rear mudguard and several features that were to make it through to the final design. Once again, the feedback from market research was that it was still too radical so the lines were simplified and smoothed out to create the Series S3.
Part of the reason for the secrecy was competition from other manufacturers. Yamaha launched the , badged as a ', engine in 2002, with the introduction of the Road Star Warrior and Honda launched the VTX1800, so a decision was made to go for a displacement of 2,294 cc.
The first engine was built in summer 2002 and tested in the autumn. Twin butterfly valves for each throttle body were used to increase control and allow the ECU to vary the mixture flow and ignition map according to the gear selected and speed. The torque curve is modified for each gear ratio, enabling over 90% of the engine’s torque output at 2,000 rpm, giving the high levels of flexibility that the designers needed. The 1,500 W starter motor on the Rocket III puts out as much power as the engine on the very first Triumph motorcycle, Siegfried Bettmann's 1902 single.〔(2005 Triumph Rocket III: First Ride - MotorcycleUSA.com )〕
The final design of the S3 prototype had a large tubular steel twin-spine frame, designed by James Colbrook.〔http://www.mae.uk.com/Triumph%20Rocket.PDF〕
Andy Earnshaw was responsible for designing the gearbox and shaft drive to a 240/50ZR16 bike specific rear tyre. High specification front brakes were twin four-piston callipers with 320 mm floating discs and the rear brake, developed specifically for the purpose, was a single twin piston calliper and 316 mm disc. Ride handling is controlled by purpose built rear shocks and 43 mm 'inverted' front forks.
In 2003, the prototype was renamed the 'Rocket', following market research, continuing the heritage of the BSA Rocket 3/Triumph Trident motorcycles. It was unveiled in the USA on 20 August 2003, in San Antonio, Texas.〔(Triumph 2004 Rocket III Announced )〕
The Rocket's European launch was at the International Motorcycle Show in Milan, Italy on 16 September 2003. Sold in the UK from the spring of 2004, it was awarded 'Machine of the Year' by ''Motor Cycle News'' at the 2004 NEC Motorcycle Show. The Australian launch was in Sydney in August 2004, with 230 deposits taken before any had been shipped into the country.〔(Triumph Rocket III - Motorbike Review - BikePoint )〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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