Paper says design integrating rotational and straight-line detonation across a wide speed range is ‘world first’ and testament to Chinese ingenuity.

The “revolutionary” air-breathing engine could, in theory, lift an aircraft from a runway to more than 30km (18.6 miles) into the stratosphere and continuously accelerate it to 16 times the speed of sound.

At this velocity, even the longest intercontinental flights could take just one or two hours while consuming less fuel compared with conventional jet engines.

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