Dead simple on paper but very tricky to build, the hypersonic scramjet engine gets a boost from a new jet-fuel-based design. Mach 8 here we come?
You don't run this wind tunnel. You fire it. With the help of air pumped to 160 times atmospheric pressure and a highly explosive combination of hydrogen, oxygen, and a megawatt generator, the tunnel, set in a suburban Long Island business park, can reproduce the hellacious conditions an aircraft would encounter while traveling 20 miles above Earth at 5,300 mphMach 8a speed at which the violent airstream packs enough energy to soften and melt solid nickel alloys.