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Old December 6th 18, 08:42 PM posted to sci.space.policy
Fred J. McCall[_3_]
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Default Falcon 9 Delivers Dragon Into Orbit, Flubs Landing

Niklas Holsti wrote on Thu, 6 Dec 2018
19:01:58 +0200:

On 18-12-06 13:06 , Jeff Findley wrote:

Also, the stage managed to land very well on the ocean (as can be seen
in a video posted by an observer on social media). SpaceX also released
the on board camera footage from the stage which showed that once the
landing burn started, the engines were able to negate the roll caused by
the stuck grid fin.


I thought the landing uses only one engine, therefore probably the
center engine -- then how can the engine control roll? I don't understand.


The same way any other single engine booster controls roll, I would
think. The engine gimbals.


--
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