Reportage exceptionnel sur Proton

1969 April 2 - 10:33 GMT - Baikonur LC81/24. Proton-K/D 233-01 FAILURE: First stage - 1 x RD-253 fire beginning at T+ 0.02 sec, rocket crashed near pad. M-69 s/n 522 Spacecraft: Mars M-69. Agency: RVSN. Mars probe intended to enter Martian orbit and comprehensively photograph Mars, together with a landing probe. Further Mars launches during the 1969 launch window were cancelled when this attempt resulted in a major accident, which almost wiped out all of the leaders of the space industry. The Proton rocket lifted off, but one engine failed. The vehicle flew at an altitude of 50 m horizontally, finally exploding only a short distance from the launch pad, spraying the whole complex with poisonous propellants that were quickly spread by the wind. Everyone took off in their autos to escape, but which direction to go? Finally it was decided that the launch point was the safest, but this proved to be even more dangerous - the second stage was still intact and liable to explode. The contamination was so bad that there was no way to clean up - the only possibility was just to wait for rain to wash it away. This didn't happen until the Mars launch window was closed, so the first such probe was not put into space until 1971. This accident also severely damaged plans to divert attention from America's Apollo programme during the rest of 1969. 10-12 UR-500K launches had been intended to land on the moon lunar soil return and rover robots to supplement the N1 launches.

nikolai39 a écrit:A priori c'est le vol du 2 avril 1969...

Trouvé sur le site de Mark Wade :

1969 April 2 - 10:33 GMT - Baikonur LC81/24. Proton-K/D 233-01 FAILURE: First stage - 1 x RD-253 fire beginning at T+ 0.02 sec, rocket crashed near pad. M-69 s/n 522 Spacecraft: Mars M-69. Agency: RVSN. Mars probe intended to enter Martian orbit and comprehensively photograph Mars, together with a landing probe. Further Mars launches during the 1969 launch window were cancelled when this attempt resulted in a major accident, which almost wiped out all of the leaders of the space industry. The Proton rocket lifted off, but one engine failed. The vehicle flew at an altitude of 50 m horizontally, finally exploding only a short distance from the launch pad, spraying the whole complex with poisonous propellants that were quickly spread by the wind. Everyone took off in their autos to escape, but which direction to go? Finally it was decided that the launch point was the safest, but this proved to be even more dangerous - the second stage was still intact and liable to explode. The contamination was so bad that there was no way to clean up - the only possibility was just to wait for rain to wash it away. This didn't happen until the Mars launch window was closed, so the first such probe was not put into space until 1971. This accident also severely damaged plans to divert attention from America's Apollo programme during the rest of 1969. 10-12 UR-500K launches had been intended to land on the moon lunar soil return and rover robots to supplement the N1 launches.

http://www.astronautix.com/lvs/proton.htm

nikolai39 a écrit:C'est ici :

https://www.youtube.com/watch?v=Al-YQGVQAbM

Au début il y a des images absolument EXTRAORDINAIRES d'un échec survenu en 1969.
Il y en a eu 5 cette année là, je vais essayer d'enquêter pour déterminer lequel c'est...

buran a écrit:Dans le reportage ils disent que la fusée devait emporter le Lunakhod 1 (1:31 min).

nikolai39 a écrit:

buran a écrit:Dans le reportage ils disent que la fusée devait emporter le Lunakhod 1 (1:31 min).

Exact, le commentaire dit que la charge utile était un Lunokhod.
Dans ce cas ça voudrait dire que c'est le vol du 19 février 1969. Il a lui aussi été victime d'une panne du premier étage, et s'est écrasé à 15km du pas de tir...

nikolai39 a écrit:Je vais essayer de regarder la cohérence au niveau des heures de lancement, et peut-être aussi d'identifier le pas de tir, peut-être que ça aidera.

Vonfeld a écrit:le premier lancement de Lunokhod avec Proton se termine par une explosion du premier étage après 40 secondes de vol environ.
On le voit à la fin de ce documentaire soviétique : Lunokhod.51e8-low.avi récupéré sur Spacevideo.ru qd c'était encore gratuit ( http://www.spacevideo.ru/download.php?filename=51e8-low.avi )

VONFELD