Design
The TKS spacecraft was designed by Vladimir Chelomei as a manned spacecraft launched with Proton rocket alternative to the Soyuz spacecraft. Development began in 1965, but by the time the first flight articles were ready the Almaz programme had been abandoned. The VA spacecraft ("Vozvrashaemiy Apparat") was flown separately on four test missions with two craft per launch to test the design, as well as one "all-up" test mission and three resupply missions. It was never flown manned, although in December 1978 formation of a special group of six cosmonauts was approved for manned missions on board the TKS spacecraft.
The project had further evolved with space station "Modulny" ("Modular") based on the TKS design outline, reworked to dock with Salyut 7, Mir and ISS space stations. This development was designated FGB, or Functional Cargo Block.
The TKS spacecraft consisted of an 11F74 "Vozvraschaemyi Apparat" (or Return Vehicle commonly referred to as the VA), attached to an 11F77 "Transportniy Korabl Snabzheniya" (Functional/Cargo Block module or FGB).
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