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The Arrows A9 was a Formula One car which the Arrows team used to compete in the 1986 Formula One season. It was powered by the tubocharged Inline 4cyl BMW M12 engine. Unlike the BMWs used by the Brabham and Benetton teams whose engines were maintained and updated regularly by BMW, the Arrows engines were maintained by Swiss engine guru Heini Mader and were rated as the least powerful of the BMW runners. The A9 was supposed to replace the ageing A8 car, but it turned out to be worse than its predecessor. Because of this the team stuck with the A8 from the previous season. As a result, the A9 only saw action at three races, at the German and Austrian Grands Prix, in the hands of Thierry Boutsen, in both of these races the car failed to finish after its turbocharger failed. At the Hungarian Grand Prix team mate Christian Danner raced the A9 but retired after 7 laps with rear suspension failure. The Arrows team found that the rear end was the major problem with the A9 and for a couple of races it was run with its new front end joined to the rear end of the A8. While this actually improved the performance of the new car, Arrows soon returned to running the older A8 for the balance of the season.〔(Arrows A9 @ StatsF1 )〕 Arrows finished the season in 10th place, with a single point, earned by Boutsen's team-mate Christian Danner in Austria while driving the A8. ==Complete Formula One results== (key) * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Arrows A9」の詳細全文を読む スポンサード リンク
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