Launch FailureSoviet Space Program

Soyuz: Soyuz 7K-T No.39 (Soyuz 18a / Soyuz 18-1)

Soyuz 7K-T No.39, also known as Soyuz 18a or Soyuz 18-1, was intended to be the next crewed mission to the Salyut-4 space station. The mission launched on April 5, 1975, 11:04:54 UTC, but due to a failure of the Soyuz launch vehicle during ascent it was aborted. Safety system initiated separation of the spacecraft, and the crew of commander Vasili Lazarev and flight engineer Oleg Makarov experienced overloads of up to 21.3 g. The capsule landed safely at 11:26:21 UTC, followed by a successful rescue of the crew members.

Saturday, 5 April 197511:04 UTC

Soyuz

Mission Data

🇷🇺Soviet Space ProgramEst. 1931

Launch VehicleSoyuz

Vehicle FamilySoyuz

Vehicle Record30 of 32 launches (93.8%)

Provider TypeGovernment

Agency Record2288 successes / 168 failures (93%)

Success Streak17 consecutive

ProgramSoyuz · Human Spaceflight

Mission TypeHuman Exploration

Target OrbitLow Earth Orbit

Launch Pad1/5

Location🇰🇿 Baikonur Cosmodrome, Republic of Kazakhstan KAZ

Orbital Launches This Year#26

Agency Launches This Year#20

Launches From This Pad487

Launches From This Site1,565

Status Note

Either the launch vehicle did not reach orbit, or the payload(s) failed to separate.

Launch Site

1/5 · 45.9200°N 63.3420°E

Launch data from Launch Library 2 by The Space Devs.