Soyuz 18A


International Flight nº: 55

Earth orbit Flight nº: -

USSR launch Flight nº: 25

Launch, orbit & landing data:

Designation F00725 / 75F02
Launch date - time 05 Apr 1975 - 11:04:54 UT
Launch site Baikonur, LC1
Launch vehicle  Soyuz 11A511
OKB name - S/Nº Soyuz 7K-T s/n 39
Basic shape  Sphere-cylinder + 2 wings
Dimension (m) 7.5 long, 2.2 dia
Mass (kg) 6,830
Call Sign Ural (Urals)
Backup crew Klimuk, Sevastyanov
Altitude 192 km
Landing date - time 05 Apr 1975 - 11:26:21 UT
Landing location 50° 50' N, 83° 25' E
Flight Duration (d:hr:min) 21m 27s

Crew Soyuz-18A

Launch failure and emergency landing at 1800km from launch place.
Suborbital mission; aborded because third stage of Soyuz rocket failed to separate from second stage.
Ballistic trajectory (180 km) qualified as a spaceflight.

Flight Crew

Nr. Surname Given name Job Duration
1  Lazarev  Vasili Grigoriyevich  Commander 21m 27s  
2  Makarov  Oleg Grigoriyevich  Flight engineer 21m 27s  

Backup Crew

Nr. Name Job
1  Klimuk, Pyotr Iliyich  Commander
2  Sevastiyanov, Vitali Ivanovich  Flight engineer

Backup Soyuz-18A

Mission details:

Carried Oleg Makarov, Vasili Lazarev for rendezvous with Salyut 4; but during second-third stage seperation third stage failed to separate from second stage but still ignited. The crew demanded that the abort procedures be implemented but ground control could not see the launch vehicle gyrations in their telemetry. Soyuz finally was separated from by ground control command at 192 km, and following a 20.6+ G reentry, the capsule landed in the Altai mountains, tumbled down a mountainside, and snagged in some bushes just short of a precipice. The crew was worried that they may have landed in China and would face internment, but after an hour sitting in the cold next to the capsule, they were discovered by locals speaking Russian. Total flight duration was 1574 km and flight time 21 minutes 27 seconds. Lazarev suffered internal injuries from the high-G reentry and tumble down the mountain side and never flew again. Both cosmonauts were denied their 3000 ruble spaceflight bonus pay and had to apeal all the way to Brezhnev before being paid.

Astrophilately covers:

Soyuz 18-1

Launch cancel Moscou.

Ref.: #7, #8, #16, #125, #210 - update: 28.11.18 Home