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The pintle center body/tip is made out of copper, while the baseplate is made out of steel. The interruption in the manifold is so igniter/PT ports can connect to the chamber offset from the holes. As of now, this injector stiffness is still (barely) above 15% for 25% throttle. However, we We haven't accounted for pressure loss in the regen channels yet. However, but since the fuel and oxidizer will be in separate tanks, the fuel pressure is not reliant on the ox pressure; we can increase the tank fuel pressure to account for the the pressure loss in the channels.
Future things to consider:
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