Tsiklon-3 from Plesetsk failed on first stage while carrying a cluster of six Strela-3 military store-and-dump communications satellites (intended Kosmos 1786–1791), none of which reached orbit.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 49th
- of 122 Tsiklon-3 flights
- Date and time
- 15 October 1986, 05:24 UTC
- Rocket
- Tsiklon-3
- Builder
- Yuzhmash
- Launch site
- 32/2, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- Launches in 1986
- 83rd of 110