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Overall view of the F-1 Engine Test Stand RP-1 tank (far right).

The RP-1 tank is approximately 2/3 the height of the LOX tank and is the lower tank, visible under the thicker work platform in this pre-removal photo of the F-1 Engine Test Stand. See "Floor Plans - Fuel Tank Support, Fuel Platform, and LOX Platform Plans" and "Building Section" drawings at HABS/HAER for additional information about the propellant tanks prior to their removal.

Aerial view of the tank's location when I photographed it.