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Dome F105
The Dome F105 was an unraced Formula One car designed and built by the Japanese motorsport constructor, Dome.
==Concept and construction==
Dome was founded in 1975 by brothers Minoru and Shoichi Hayashi, who had built their first racing car ten years earlier. In 1980 the company built its first Formula Three car, and the Hayashi Racing team won the All-Japan Formula Three Championship in 1981 using its own 320 chassis. Dome first entered the Japanese Formula 3000 series in 1987, using a March chassis, but had plans to build its own chassis. Hayashi established a separate company, Jiotto Design, as a design department for Dome. As a result of this progress, Marco Apicella won the 1994 championship driving the Dome F104 chassis equipped with a Mugen Honda engine. Jiotto's facilities included a 25 per cent wind tunnel, computer-aided design and computer-aided manufacturing equipment, and several autoclaves: all of which could be used to design and construct a more complicated Formula One car.〔, p. 17.〕
In 1995, the former team manager of the Minardi Formula One team, Tadashi Sasaki, joined Dome.〔 Sasaki organised a Formula One project which was announced in the autumn of that year. Akiyoshi Oku, who had designed the F104 F3000 car, began work on the new F105 chassis in the summer of 1995. Sasaki's influence was crucial, as he was in a position to buy Minardi's old gearbox and hydraulic systems to use on the F105. The transmission was a six-speed semi-automatic gearbox designed by Xtrac, and had previously been used, in addition to the Minardi team, by the unraced DAMS GD-01 car and formerly in the Simtek S941 chassis during the season. In terms of the car's engine, Dome's success with Mugen Honda engines in the Japanese racing scene ensured that the F105 would be powered by the company's MF301 V10 engine, as used by the Ligier team during the 1995 Formula One season. Dome's close association with Mugen, a subsidiary of Honda, sparked rumours that the Japanese company was using the Dome F105 project as a discreet evaluation of a return to Formula One after its own withdrawal from the sport at the end of the season.〔, p. 18.〕 Dome has denied that this was the case, insisting that it was an independent effort.〔, p. 19.〕
The F105 was, like any Formula One car of its time, constructed around a carbon-fibre monocoque.〔 It featured a conventional double wishbone suspension arrangement with pushrod-actuated dampers provided by Showa. Dome reached an agreement with Goodyear for tyres, although this was almost scuppered when the American company suspected that the F105 project was a ruse constructed by Japanese rival Bridgestone, which had announced its own intention to enter Formula One in , to acquire information about its tyres.〔 The F105 ran on magnesium wheels made by Rays, with dimensions of by at the front, and by at the rear.〔 It also featured one-piece bodywork covering the sidepods and engine cover.〔, p. 25.〕 The F105 was liveried in traditional Japanese white with a fluorescent yellow stripe around the cockpit and engine cover, and had minimal sponsorship. The car was completed on March 17, 1996.〔
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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