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The Luna 8K72 vehicles were carrier rockets used by the Soviet Union for nine space probe launch attempts in the Luna programme between 23 September 1958 and 16 April 1960.〔(【引用サイトリンク】title=Soyuz - Version: Luna 8K72 )〕 Like many other Soviet launchers of that era the Luna 8K72 vehicles were derived from the R-7 Semyorka design (a variation of the Vostok), which is also the basis for the modern Soyuz rocket. The first flight of a Luna 8K72 (September 1958), which was to launch the Luna E-1 No.1 probe, ended 92 seconds after launch when the rocket broke up from longitudinal vibration (a.k.a. POGO), causing the strap-ons to separate from the vehicle, which then crashed downrange.〔(【引用サイトリンク】title=Tentatively Identified Missions and Launch Failures )〕 The second flight of a Luna 8K72 (October 1958), which was to launch the Luna E-1 No.2 probe, ended 104 seconds after launch when the rocket again disintegrated from vibration. The third flight of a Luna 8K72 (December 1958), which was to launch the Luna E-1 No.3 probe, ended 245 seconds after launch when the Blok A core stage shut down from loss of engine lubricant. The resonant vibration problem suffered by the 8K72 booster was the cause of a major argument between the Korolev and Glushko design bureaus over the cause and solution to it. It was believed that the vibrations developed as a consequence of adding the Blok E upper stage to the R-7, shifting its center of gravity. == Luna 1 == The first probe launched by a Luna 8K72 to reach orbit was Luna 1, launched 2 January 1959, which was intended as a lunar impactor mission.〔(【引用サイトリンク】title=Soyuz - Soyuz Chronology )〕 Luna 1 instead passed within of the Moon's surface 4 January 1959, and then went into orbit around the Sun between the orbits of Earth and Mars.〔(【引用サイトリンク】title=Luna 1 - NSSDC ID: 1959-012A )〕 The fifth flight of a Luna 8K72 (July 1959) ended 220 seconds after launch due to a guidance malfunction of the Blok A core stage, leading to RSO destruct. 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「Luna (rocket)」の詳細全文を読む スポンサード リンク
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