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Detail of the flat spot on the fuel inlet manifold; on an actual thrust chamber, there would be a fuel inlet here with a flange onto which the fuel high pressure duct would be bolted.

Picture 1 of 2.

On this particular test turbopump, I'm not certain where the discharge from the fuel turbopump was directed. On an actual thrust chamber, 70% of the fuel would have been directed down the regenerative cooling tubes comprising the thrust chamber, but of course this is a truncated thrust chamber (and many tubes have had sections removed).

 
Fuel inlet manifold on F-1 Engine Turbopump from Cold Calibration at Marshall Space Flight Center
Time picture taken Fri Sep 19 13:01:58 2014
Location picture taken Boneyard
Southeast of S-IC Test Stand
West Test Area
Marshall Space Flight Center
Huntsville, AL
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