The first stage is powered by the LB-7, a staged combustion-cycle liquid-oxygen and liquid hydrogen engine, which delivers a thrust of 110 tonnes in vacuum.
Baby Bantam(kerosene/LOX)- In June 2014, Aerojet Rocketdyne announced that they had"manufactured and successfully tested an engine which had been entirely 3D printed.".
Although the agreement itself did not specify the work involved, a spreadsheet summarizing NASA's contracts describes the project as a liquid oxygen/methane“lander propulsion collaboration.”.
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