Instead it used differentiall throthling of outer ring engines to provide pitch and yaw, the downside is that it does not provide roll control. I actually managed to make that in game, and it actually reduces the cost, as gimballed engines are more expensive and heavier than not gimballed ones.
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242 Dereric
@jacobssgt2
Are you sure?
Afaik the RD-107 should look like 6 engines, because it has only 2 Vernier engines, the RD-108 has 4 Vernier engines. The 107 was used at the Soyuz booster, while the 108 was used at the Soyuz core stage. And both engines used 2 turbopumps, one for RP1 and one for LOX. Both pumps were powered by the same turbine, maybe that's the reason for the confusion. -
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197 jacobssgt2
@Zenithspeed
In most Soviet engines verniers are not separate small engines, but just auxiliary combustion chambers, that share the same turbopump as the main combustion chamber. RD-107 may look like 8 rocket engines, but in real it's just one turbopump with 8 combustion chambers. Howewer, N-1 did not use verniers. -
26.8k Zenithspeed
honestly it surprises me that the Russians always opted for the little vernier thrusters (i think that's what they're called?) rather than full gimbal thrust vectoring, but hey, it works, so i'm not complaining
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10.3k deepfriedfrenchtoast
yeah The N1 used grid fins on the first stage to control roll
@KirRu That was still not enough and N-1 suffered roll stability problem, but in Juno I did not encounter this problem.