Britain risks being left behind in the race for hypersonic travel
Britain’s aerospace industry used to do a good line in exotic aircraft straight out of an episode of Thunderbirds. There was the Fairey Rotodyne, a big part-helicopter, part-plane with rockets at the tips of its rotor. Noise, apparently, was a problem. The Saunders-Roe Princess was an enormous flying boat that arrived just in time to…