View of the engine's steam duct and heat exchanger (the latter being the middle
Steam from the steam
generator, after passing through the turbine to drive the
turbopump, exited the turbine housing
and passed through the heat exchanger.
Liquid oxygen and pressurized air from the air storage spheres were
passed through coils in the heat
exchanger, where they were heated by the exhaust steam. The resulting
gaseous oxygen was used to pressurize the LOX tank and the expanded air was
used to pressurize the alcohol tank and for the stage pneumatic system.