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Liftoff of the "That's Not a Knife" suborbital mission occurred at 7 p.m. ET on Friday (Feb. 27). When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

A jet engine is any engine that can propel an aircraft of some kind via rearward expulsion of a jet of fluid, typically a hot exhaust gas that the engine generates by drawing in fuel from the ...

An Australian-made hypersonic vehicle completed its first flight late on Feb. 27, propelled to Mach 5-plus speeds by a Rocket Lab HASTE rocket from Wallops Island, Virginia. The scramjet-powered, ...