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T O P I C R E V I E WJim_VoceThe Soyuz LOK spacecraft for lunar orbit flights had a back-up engine positioned at the front of its orbital module. This back-up engine was to be used to break the Soyuz out of lunar orbit in case the primary engine in the instrument module failed. But as I recall, the earth orbital Soyuz carried both its primary engine and back-up engine in the instrument module.Why did the LOK have its back-up engine on the orbital module? Does this presume that the instrument module only had a primary engine and no back-up engine?Jim Behling quote:Originally posted by Jim_Voce:The Soyuz LOK spacecraft for lunar orbit flights had a back-up engine positioned at the front of its orbital module. The premise is wrong. It did not have a backup engine in that location. That was the Kontact system.
But as I recall, the earth orbital Soyuz carried both its primary engine and back-up engine in the instrument module.
Why did the LOK have its back-up engine on the orbital module? Does this presume that the instrument module only had a primary engine and no back-up engine?
quote:Originally posted by Jim_Voce:The Soyuz LOK spacecraft for lunar orbit flights had a back-up engine positioned at the front of its orbital module.
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