40,000 HP gas turbine to provide mechanical power for an engine I am working on. the last pic shows the premix tube where the O2 an fuel are first come together. The reason for gases O2 is the engine is design to use atmosphere O2 then switch on board O2 (converted to gases state) so it able to climb to orbit.

Also I should mention the voids in the power head (blue/green outline) are filled with a high temp foam that's very hard and ridged..Also we are thinking about 3D printing this part of the engine.