Descrizione : Launched on 3 December 1965, nearly succeeded. Before the scheduled firing of its retrorocket, the cushioning air bags around the landing probe were to be inflated, but a plastic mounting bracket apparently pierced one of the two air bags, causing the ejection of the air , which put the spacecraft into a spin of about 12° per second. Luna 8 temprarily regained its proper attitude, long enough for a nine-second-long retrorocket firing, but then becoming unstable again. Without a retrorocket burn long enough to reduce its velocity sufficiently for a survivable landing, Luna 8 impacted the lunar surface 6 December 1965.

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LUNA 8 YE-6 11 · LUNAR PROGRAM · PARTIAL FAILURE