Step 6

The vertical installer raises the engine. Engineers then attach the engine's Gimbal Assembly Block to the thrust measurement system, and attach the test stand's two actuator arms to the engine frame, securing the engine to the test stand at three points.

G4049 Engine Vertical Installer raises F-1 rocket engine in F-1 Engine
	Test Stand

Photo Credit HABS/HAER via Marshall Space Flight Center
Extraction and adaptation by heroicrelics
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