In a traditional ramjet, the air entering the engine inlet is slowed by the shock cones which narrow the passageway for air pressure, and in turn, increase the jet's speed. However, scramjets use ...

the beginning of the engine's core, increasing the air's pressure and temperature. From there, it's pushed into the combustion chamber, where the hot air is mixed with jet fuel and ignited.

At Mach 9, the tests revealed pressure spikes at detonation points reaching 20 times that of ambient levels, suggesting the engine was capable of generating a considerable thrust in a speed region ...