Failed Voskhod launch from Plesetsk of a Zenit-4M high-resolution film-return photoreconnaissance satellite (would-be Kosmos 429). The rocket failed to orbit the optical imaging payload on 25 June 1971.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 157th
- of 299 Voskhod flights
- Date and time
- 25 June 1971, 10:30 UTC
- Rocket
- Voskhod
- Builder
- RKK Energia
- Launch site
- 43/4 (43R), Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- Launches in 1971
- 62nd of 133