Soyuz 7K-OK No.1, an uncrewed Soyuz systems test on an 11A511 from Baikonur Site 31; a strap-on failed to ignite, then the launch escape system fired on the pad, igniting the vehicle, destroying the pad, and killing three ground personnel.
- Outcome
- Failure
- Payload to orbit
- Did not reach orbit
- Flight
- 2nd
- of 32 Soyuz 11A511 flights
- Date and time
- 14 December 1966, 11:00 UTC
- Rocket
- Soyuz 11A511
- Builder
- Progress RSC
- Launch site
- 31/6, Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Unknown
- Launches in 1966
- 124th of 131