It looks like that Boeing jet we showed you yesterday isn't going to be the only airplane using hydrogen if the European Union has its way. The European Space Agency just got $14.5 million in a second round of funding from the EU to study the idea of developing A2, a hydrogen-fueled hypersonic aircraft that might travel at an incredible speed of Mach 5.5. They're studying what it would take to build an aircraft so fast that you could fly from Brussels to Sydney in 4.6 hours. Sheesh, that's 10,407 miles. There's even talk of an engine that could propel the craft to Mach 8. This rocket plane makes the Mach 2 of the Concorde seem glacially slow.
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