Mach 5

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Mar 15, 2007

Green Skies at Mach 5

This hydrogen-burning hypersonic airliner could fly more than twice as fast as the 1,350mph Concorde—and its passengers would travel absolutely guilt-free

Modern air travel is a marvel. It's also a source of endless delay, annoyance and planet-killing greenhouse gases. A proposed hydrogen-powered hypersonic airliner could change all that. The plane is Reaction Engines's A2 concept, a Mach-5 (3,400mph) craft for 300 passengers funded in part by the European Union's Long-Term Advanced Propulsion Concepts and Technologies project (Lapcat). Lapcat wants an airliner that can fly from Brussels to Sydney in less than four hours. If built, the A2 will do just that—without producing a trace of carbon emissions.
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