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The Sukhoi T-4, or "Aircraft 100", or "Project 100", or "Sotka" was a Soviet high-speed Reconnaissance, anti-ship and strategic bomber aircraft that did not proceed beyond the prototype stage. It is sometimes called the Su-100.〔(Sukhoi T-4 "Sotka" at the Russian Air Force Museum (Monino) )〕 ==Development== In 1963, the Soviet government held a Request for proposal among the aircraft design bureaus, with the aim of developing an aircraft analogous to the North American XB-70 Valkyrie. The Sukhoi design, with its high cruise speed of was favored over the designs submitted by Yakolev and Tupolev and after a preliminary design review in June 1964, the building of a prototype was authorized. Development of the T-4 was fraught with difficulties and required a massive research effort to develop the technologies necessary, including the manufacturing technologies to machine and weld the materials necessary to withstand sustained Mach 3 flight. Nearly 600 patents or inventions are attributed to the program.〔(T-4 on Sukhoi Company website )〕 The first flying prototype was finally completed in the autumn of 1971. Work continued on an additional three airframes (one for static testing) through 1975. In 1974, the Ministry of Aviation Industry (MAP) ordered work suspended on the T-4 project, which was officially scrapped on 19 December 1975. The T-4 had intake ramps similar to the XB-70, was made largely from titanium and stainless steel, and featured a quadruple redundant fly-by-wire control system but also employed a mechanical system as a backup. The aircraft's Droop-nose lowered to provide visibility during takeoff and landing. A periscope was used for forward viewing when the nose was retracted, and could be employed at speeds of up to 600 km/h (373 mph). Drogue parachutes were used in addition to conventional wheel brakes.〔 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「Sukhoi T-4」の詳細全文を読む スポンサード リンク
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