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.