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Soyuz 7K-T (successor) | status = No longer in service | built = 16 | launched = 16 | first = Kosmos 133, 1966 | last = Soyuz 9, 1970 }} Soyuz 7K-OK was the first generation of Soyuz spacecraft in use from 1967 to 1971. This first generation was used for the first ferry flights to in the Salyut space station program; Soyuz spacecraft in their current generation are still in use to ferry crew to and from the ISS. This generation is notable for the only fatalities of the Soyuz programme , with Soyuz 1 in 1967 (sole crew-member killed by parachute failure) and Soyuz 11 in 1971 (crew killed by depressurisation during reentry). The first unmanned automated docking in the history of spaceflight, between Kosmos 186 and Kosmos 188 in 1967, was achieved with this generation of Soyuz spacecraft. The generation encompasses furthermore the first docking between two manned spacecraft (Soyuz 4 and Soyuz 5), the longest manned flight involving only one spacecraft (the 18-day flight of Soyuz 9 in 1970) and the first successful manning of the first space station in the history of space flight (Soyuz 11 and Salyut 1 in 1971). The Soyuz 7K-OK vehicles carried a crew of up to three without spacesuits. The craft can be distinguished from those following by their bent solar panels and their use of the Igla automatic docking navigation system, which required special radar antennas. The 7K-OK was primarily intended as a variant of the 7K-LOK (the lunar mission Soyuz) for Earth orbital testing. Mostly the same vehicle, it lacked the larger antenna needed to communicate at lunar distance. The early Soyuz models also sported an external toroidal fuel tank surrounding the engines and meant to store extra propellant for lunar flights, but it was left empty on Soyuz 1-9. After the spacecraft was converted to a space station ferry, the tank was removed. Soyuz 7K-OK spacecraft had an docking mechanism of the original Soyuz "probe and drogue" type to dock to other spacecraft, in order to gather engineering data as an preparation for the Soviet space station program. There were two variants of Soyuz 7K-OK: Soyuz 7K-OK(A) featuring an active "probe" docking port, and Soyuz 7K-OK(P) featuring an passive "drogue" docking target. For unknown reasons, both the 7K-OK and 7K-LOK did not have docking mechanisms that opened or allowed internal transfer (this did not arrive until the 7K-OKS), thus cosmonauts had to spacewalk for this. The procedure was done successfully on the joint Soyuz 4 and Soyuz 5 missions, where Aleksei Yeliseyev and Yevgeny Khrunov transferred from their Soyuz 5 to the Soyuz 4 craft. The first unmanned test of this version was Cosmos-133, launched on Nov. 28, 1966. ==Soyuz 7K-OKS== (詳細はSoyuz "probe and drogue" docking mechanism that allowed internal crew transfer – this was done successfully with the manning of the Salyut 1 space station by Soyuz 11. This probe and drogue docking adapter is in use until today at the ISS. 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「Soyuz 7K-OK」の詳細全文を読む スポンサード リンク
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