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Alexandr Volkov (code name Donbass) replaced Artsebarski as his commander aboard Mir. In this work, crewmembers are listed commander first, flight engineer second, and cosmonaut-researcher last. Missions in which this convention does not hold true are noted.	1.3 The Original Soyuz (1966-1970) The three-seater Original Soyuz(figure 1-6) was the first ancestor of the Soyuz-derived vehicles in use today. The Original Soyuz played much the same role in the Soviet manned lunar program as Gemini did in the U.S. manned lunar program. That is, it provided experience in essential techniques and technologies for lunar flight.	Figure 1-7. Soyuz rocket. With more than 1000 launches to its credit since 1963, the two-and-a-half-stage Soyuz rocket has flown more than any other. Propellants are liquid oxygen and kerosene. Weight of payload launched to 200-km, 51° circular orbit is 7000 kg.
Figure 1-6. Original Soyuz spacecraft.