Breakthrough for hypersonic jet that could fly at Mach 25
A British effort to build a revolutionary ‚Äúspaceplane‚ÄĚ that would fly at 25 times the speed of sound has passed a critical testing milestone.
Reaction Engines, which is based in Oxfordshire, has tested a ‚Äúpre-cooler‚ÄĚ ‚ÄĒ a technology that could allow aircraft to travel faster than ever before ‚ÄĒ at simulated speeds of Mach 3.3, or more than three times the speed of sound.
This smells like a corporate press release intended to excite investors. We'll see.
Anyway, haven't we been told by Experts that supersonic transport is dangerous for the ozone layer, so that we'd all die from too much UV radiation? That was one reason the US SST program (i.e. Boeing 2707) was canceled back in 1971, in addition to the noise. One of the few wise things Congress did back then, in hindsight, though it contributed to a meltdown in the aerospace biz.
There was much hype on both sides of the issue, industry claiming we'd fall behind the Russians and Anglo-French. Funny how things turned out: Boeing's "fallback" design, the 747, which mgmt. feared would fail in the market, outlived the Concorde and the Tu-144.