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I just watched an NSF video and they say it was Ship 30. It's sitting on the engine installation stand, so it wouldn't make sense for it to be Ship 29.
Fascinating. It never registered that the external spindle shape is an entire turbopump unit (CH4). I assume LOX is on the centerline because it's moving more mass (LOX:CH4 combustion mass ratio is 4:1, so a lot more LOX mass is running through that section).
That is a cool animation. It also appears that the CH4 pumps from the top down to about the middle, where the CH4 is then routed to nozzle heat exchangers, and then returns at the bottom where it flows upwards... whereas the LOX flows straight down in to the engine...