The prototype engine demonstrated 79% fuel efficiency at six times the speed of sound, claimed Chinese military scientists.
Chinese military researchers have allegedly made a big advancement in improving the effectiveness of air-breathing engines that utilize solid-state fuel for hypersonic flight.
The researchers introduced boron powder into the combustion chamber, and by switching the powder injection mode from single to multiple nozzles, they produced extra shock waves that expanded and flowed higher toward the air entrance, instantly slowing the speed of the fresh air. "A solid scramjet engine has numerous advantages, such as simple structure, high volume-specific impulse, high flame stability, and the potential to work in a wide speed range," Likun's team wrote in the paper.
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