The Salyut 4 space station, designated DOS-4, marked the second phase of the Soviet Union’s civilian space station program. It was an improved version of the failed Salyut 2 station, with several notable enhancements.
In a re-evaluation of the proposed test mission, the Soviets concluded that utilizing the Salyut spacecraft would not be technically and economically viable.
Finally Kraft and Gilruth told the Soviets that if they were unwilling to agree to the telephone conversations then the NASA delegation might as well pack up and go back to Houston. After some hesitation, the Soviets decided to try … Continue reading →