|
__NOTOC__ The Spitfire Mark II, later given the name Tigershark,〔 was a utility helicopter built in the United States in the late 1970s and intended for series production.〔Taylor 1989, p.839〕〔Simpson 1998, p.234〕〔Taylor 1977, p.411〕 It was a further evolution of the Spitfire Mark I design, a turbine-powered conversion of the Enstrom F-28.〔 Although airframe changes on the Mark I had been minimal, the Mark II had a substantially redesigned fuselage that rearranged the F-28's 2+2 seating to move the pilot's seat forward in the nose by itself and add a bench seat for three passengers abreast behind it.〔"Spitfire prepares new model production", p.12〕〔Lambert 1977, p.404〕 The leftmost seat on the bench could be fitted with dual controls.〔 The fuselage was lengthened,〔 and the powerplant installation (the same Allison 250 used on the Mark I) was mounted well to the rear.〔 The Mark II still used the dynamic components of the F-28, plus some of its airframe.〔Lambert 1979, p.1581〕 Spitfire displayed a mockup of the Mark II at the Helicopter Association of America meeting in Anaheim, California in February 1977.〔 The prototype first flew in February 1979 and by July that year, the company reported that it had sold 42 examples〔 of the Mark I and Mark II and expected to build 60 aircraft during 1980.〔 However, Spitfire remained dependent on Enstrom to supply airframes for remanufacture,〔〔"Enstrom prepares Polish link", p.1444〕 and Enstrom distanced itself from the project somewhat.〔 Competing plans by Enstrom and Spitfire to market Polish-built Mil Mi-2 helicopters in the United States might have contributed to the friction.〔 In Spitfire's version of the deal, Polish manufacturer PZL-Świdnik (represented by its trade bureau Pezetel) would also contribute to the Spitfire manufacturing efforts.〔 By November 1979, Enstrom refused to supply airframes to Spitfire.〔"Enstrom finds new money", p.1464〕 The situation improved somewhat in the 1980s, and Spitfire president Jack Fetsko reported in May 1983 that relations with Enstrom were at the point where the two companies could "talk programs".〔 By that time, costs for the Mark II, now dubbed the Tigershark, had increased from $US 185,000 expected in 1979〔 to $US 305,000〔 but Spitfire had a firm sale for the first production aircraft.〔 Together with companies Sodian〔 and Soprea,〔Taylor 1985, p.202〕 Spitfire formed a new venture, Spitfire Helicopters International, to manufacture the Mark I and Mark II in Málaga, Spain.〔〔〔 Nothing came of the joint venture, and Spitfire's attempts to market F-28 derivatives came to an end.〔 ==Specifications== 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「Spitfire Mark II Tigershark」の詳細全文を読む スポンサード リンク
|