The BBC writes about a hypersonic plane concept patented by Airbus.
With the mix of engine types, comparatively exotic fuel, it sounds like
those tickets might get really expensive.
http://www.bbc.com/news/technology-33786999 [bbc.com]
We'll see if this ever flies, and if so, whether it will be a commercial
success, unlike the supersonic Concorde. On the military end, things
might be of more interest...