This mega motor is said to be able to send an aircraft hurtling along the air at under 4000 miles per hour, which would make it five times the speed of sound. This is over double the speed of the Concorde, which happened to be the world’s fastest passenger jet at one time when it was still in service. Apart from that, this engine can also double up as a rocket booster which propels a space plane at over 19,000 miles per hour.
Known as Synergetic Air-Breathing Rocket Engine, or SABRE for short, this might be the next big leap forward where commercial flights are concerned. SABRE can cool superheated air from 1,000 °C to minus 150 °C in under 1/100th of a second, although there is still a long way to go before it can be commercialized and is ready for everyday use.