Thrust Chamber Assembly When the fuel reaches the thrust
chamber, it is directed through 102 coolant channels in the
combustion chamber wall, providing regenerative cooling to the
combustion chamber walls, and then to the injector of the
engine. The oxidizer is routed directly to the injector. The
platelet injector assembly consists of a stack of plates, each
with an etched pattern that provides proper distribution and
propellant injection velocity vector. The stack is diffusion-
bonded and welded to the body of the injector. The fuel and
oxidizer orifices are positioned so that the propellants will
impinge and atomize, causing the fuel and oxidizer to ignite
because of hypergolic reaction. The contoured nozzle extension
is bolted to the aft flange of the combustion chamber. The
nozzle extension is made of a columbium alloy and is radiantly
cooled. The nominal flow rate of oxidizer and fuel to each
engine is 11.93 pounds per second and 7.23 pounds per second,
respectively, producing 6,000 pounds of thrust at a