Rocket engine
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A rocket engine, also known as a rocket motor, is a reaction engine, producing thrust in accordance with Newton's third law by ejecting reaction mass rearward, usually a high-speed jet of high-tempera
RS-68 being tested at NASA's Stennis Space Center
Viking 5C rocket engine used on Ariane 1 through Ariane 4
Armadillo Aerospace's quad vehicle showing visible banding (shock diamonds) in the exhaust jet
Turbopump
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A turbopump is an assembly consisting of a liquid pump driven by a gas turbine, connected via a shaft. They were initially developed in the US and Germany in the 1930s and 1940s. While other use cases
Part of an axial turbopump designed and built for the M-1 rocket engine. Axial designs are rare in turbopumps aside from a few liquid hydrogen pumps.
Robert Goddard's turbopump for his "P-Series" rockets. While rudimentary compared to modern practices, notice the pump inlet on the left, pump discharge in the foreground, turbine manifold inlet in the background, and turbine wheel on the right.
The V-2 rocket used a circular turbopump to pressurize the propellant.