Definition: In the context of aerospace and rocket propulsion, a "ramjet" is a type of jet engine. A ramjet works by generating thrust using a rotating propellant jet which imparts its thrust to an external cylinder. This can be achieved through the use of a high-speed rotator, typically made from titanium or other metals with a high specific impulse (the time it takes for the propellant to reach its maximum speed), and high efficiency heat transfer. The high specific impulse allows for rapid acceleration
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