Cosmos 881 & 882

Launch Success

Liftoff Time (GMT)

01:30:00

Wednesday December 15, 1976

Mission Details

Cosmos 881 & 882

Wiki

The TKS-VA (Transportniy Korabl Snabzheniya - Vozvrashemui Apparat) reentry capsule was the reentry module of the TKS (FGB) spacecraft. The VA was capable of 31 hours of autonomous flight after separation from the TKS. A crew of three could be carried. Access to the TKS on the pad was through a square hatch in the side of the capsule, which could also be used to conduct EVA's in orbit, with the VA acting as an air lock for the TKS. The TKS could be accessed via a hatch in the heat shield below the middle seat. With the crew, 50 kg of payload could be returned. Uncrewed 500 kg of payload could be returned. The BSO (Bloka Skhoda s Orbiti) housed the retro-rocket for deorbit of the VA capsule following separation from the space station. It was unusually mounted at the nose of the spacecraft. It also provided the additional battery power, orientation rockets, and radio equipment that gave the VA a 31 hour autonomous flight duration after separation from the TKS orbital module. The VA capsule had a hypersonic lift to drag ratio of 0.25, which allowed the BSU-V crewed capsule guidance system to manoeuvre the spacecraft to its landing point using the optimum path for minimal heating and deceleration. Once the capsule was subsonic a drogue parachute deployed for seven seconds, followed by the 1770 square meters main chute. The capsule made a soft landing using a retrorocket in the parachute lines, triggered by the Probki radioactive sensor system within the Kaktus gamma ray altimeter.

Low Earth Orbit

2 Payloads

14,400 kilograms

Rocket

Retired
Proton-K

Active 1968 to 2000

Khrunichev State Research and Production Space Center logo

Manufacturer

Khrunichev

Rocket

Height: 56.14m

Payload to Orbit

LEO: 20,100 kg

GTO: 0 kg

Liftoff Thrust

9,469 Kilonewtons

Fairing

Diameter: 4.15m

Height: 16.12m

Stages

3

Launch Site

Site 81/24

Baikonur Cosmodrome, Kazakhstan

Fastest Turnaround

6 days

Stats

Proton-K


56th

Mission

5th

Mission of 1976

Khrunichev State Research and Production Space Center


1083rd

Mission

94th

Mission of 1976

1976


124th

Orbital launch attempt