Questions tagged [ramjet]

Questions about air breathing jet engines that use forward motion to compress air at the intake, and their forward thrust used to accelerate already non-stationary spacecraft through atmospheres of celestial bodies, or interstellar medium.

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Why aren't air breathing engines used as small first stages?

I am wondering why we don't use jet engines as first stages. Most small rockets, like the Electron, can lift off with a small thrust. In the Electron's case, 192 kN. Why can't we replace the 9 ...
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Does the combination of electromagnetics and scramjets offer a viable potential for horizontal-launch?

Most horizontal-launch systems envisioned in the past, that used electromagnetics as a launch-assist, were subsonic. In order to conserve fuel during launch and to keep engine-weight to a minimal a ...