stackyFACTSStandard jet engines use heavy fan blades to suck in and compress air, but scramjets consider moving parts to be dead weight.
Standard jet engines use heavy fan blades to suck in and compress air, but scramjets consider moving parts to be dead weight. A supersonic combustion ramjet is essentially just a highly engineered tube. It relies entirely on the sheer forward velocity of the aircraft to forcefully ram atmospheric air into the combustion chamber. If you are not already moving faster than the speed of sound, the engine is completely useless.
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