04-09-2021, 08:20 AM
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Dazed and Confused
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Join Date: Mar 2005
Location: TN
Posts: 11,626
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Quote:
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Originally Posted by georgegassaway
Anyway, the first stage steering is interesting. The five "engines" have four main chambers each, which do not gimbal. The outer boosters have two small vernier engines that gimbal, and the center core had eight verniers that gimbal., for steering.
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Yes, and the verniers only gimbal on one axis. From the images, it looks like they pivot near or below their CG like a see-saw instead of being anchored at the "top" like most of our engines.
The US program's most famous (easily visible) verniers were on the Atlas, but also on the Thor. They were used to control roll because the main engine could only control pitch and yaw. The Soyuz verniers control everything.
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