|Mission duration||66 second|
|Distance travelled||30 km|
|Start of mission|
|Launch date||21 February 1969, 09:18UTC|
|Launch site||Site 110P|
Zond L1S-1 was a Zond capsule to be placed into orbit around the Moon by the first launch of the N1, a Soviet made super heavy-lift launch vehicle designed to land manned Soviet spacecraft on the Moon. The Zond capsule was equipped with a dummy lander and cameras to photograph the lunar surface for possible sites of a manned landing. The failure of the N1 launch vehicle caused the launch escape system to ignite, saving the Zond capsule from destruction.
Engines 12 and 24 shut down about 3 to 7 seconds after liftoff. The fault was found to be an error in the control system. The control system compensated by giving more power to the working engines. But at 25 seconds after lift off the control system throttled back the working engines, as there was too much vibration. At an altitude of about 30 km, just 66 seconds after liftoff, the engines again were set to full power. This caused an oxidizer pipe to break open. A fire started, and the engine's turbopumps exploded.
NASA used the Saturn V rocket for lunar missions, a super lift rocket like the N-1.
|Flight number||Date (UTC)||Launch site||Serial no.||Payload||Outcome||Remarks|
|1||21 February 1969
|Baikonur Site 110/38||3L||Zond L1S-1||Failure|
|2||3 July 1969
|Baikonur Site 110/38||5L||Zond L1S-2||Failure||Destroyed launch pad 110 East|
|3||26 June 1971
|Baikonur Site 110/37||6L||Soyuz 7K-L1E No.1||Failure|
|4||23 November 1972
|Baikonur Site 110/37||7L||Soyuz 7K-LOK No.1||Failure|