A hypersonic commercial aircraft may be developed in Japan, in an effort coordinated by the Government.

FAA employs many aviation engineers to work on research and development problems, noise pollution and hypersonic aircraft among other things.

Aerodynamic heating is a concern for supersonic and hypersonic aircraft.

Future hypersonic aircraft will employ some type of ramjet or rocket propulsion.

It was planned to be launched on the back of a hypersonic aircraft, itself capable of reaching Mach 6.

The "Aurora" is a secret hypersonic military aircraft based at Groom Lake.

And "hypersonic" aircraft, now being developed, will someday fly travelers from New York to Tokyo in two hours.

It may be a long time before we develop a glue that won't char, peel, or embrittle when subjected to temperature variations of hypersonic aircraft.

The first hypersonic aircraft was the manned X-15, a rocket-powered craft that broke speed and altitude records more than 30 years ago.

The eventual D-558-3 design, which was never built, was for a hypersonic aircraft similar to the North American X-15.