The 3D-printed and batteries powered rocket

In addition to 3D-printed parts, the Rutherford engine also has a completely new propulsion system, using brushless DC motors and high performance Lithium Polymer batteries to drive its turbo pumps, according to Rocket Lab. Turbopumps propel fuel into the combustion chamber of a rocket engine at the correct flow rate and pressure. Usually, pressurized gas is used to power a turbine, a process which is usually coupled to the combustion, making the inside of the engine tightly coupled.

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