Business Insider reported that work continues on a prototype of the jet, but portions of the aircraft have been released to the public, including testing of Lynx's supersonic engine last week.

据商业内幕网站报道，这种飞机的原型机仍在建造当中，但部分情况已对外公布，包括上周公布的“山猫”号超音速引擎测试。

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Here it would reach supersonic speeds and then shift to its scramjet engine. The scramjet scoops up air and mixes it with fuel so it burns as the mixture flows through the engine at supersonic speeds.

这里它将达到超音速然后超高速冲压喷气发动机切换成工作状态，迎面气流进入发动机，与燃料混合，混合物在超音速状态流过引擎。

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The F-5 is an agile, highly maneuverable, reliable supersonic fighter, combining advanced aerodynamic design, engine performance and low operating costs.

F - 5是一架灵活、高度可控、可靠的超音速战斗机，它结合了先进的气动设计、发动机性能和低运营成本。

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The vehicle was dropped from a carrier aircraft high above California's Mojave Desert and ignited its rocket engine to go supersonic for a few seconds.

BBC: Science correspondent, BBC News

Most recently, a team from Stanford took the helm of Sequoia to run computational fluid dynamics simulations -- a process that requires a finely tuned balance of computation, memory and communication components -- in order to better understand engine noise from supersonic jets.

ENGADGET: Stanford seizes 1 million processing cores to study supersonic noise

In 1956, the Supersonic Transport Aircraft Committee met in England to discuss building a supersonic airliner by British aircraft and engine manufacturers and the government.

FORBES: Beware Of The Concorde Fallacy