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At upper left is the hydrogen peroxide overflow and vent port. One hose from the hydrogen peroxide servicing truck would attach to the hydrogen peroxide fill and drain valve to fill the 76-gallon hydrogen peroxide tank on the engine. Another hose would attach to the hydrogen peroxide overflow and vent port on the aft face of the tail unit and connect to the H2O2 overflow tank (basically an enclosed bucket). Overflow hydrogen peroxide was diluted and discarded, due to the possibility of contamination.

The large, round fitting at center is the steam vent. The engine's steam duct would dump exhaust steam from the turbine overboard through this vent. The exhaust steam added approximately 3,000 pounds to the engine's rated thrust.

 
Hydrogen peroxide (h2o2) overflow and vent port and steam vent in interior of Redstone Tail Unit at Air Zoo
Time picture taken Mon May 19 09:13:04 2014
Location picture taken East Campus
Air Zoo
Portage, MI
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