In aerodynamics, a hypersonic speed is one that is highly supersonic ( even though the origin of the words is the same --" super " is just the Latin version of the Greek " hyper ").

* BrahMos-2-scramjet-propelled, hypersonic version.

A hypersonic cruise missile would travel at least 5 times the speed of sound.

Starting in 1955 a serious effort to equip Canada with a useful anti-ballistic missile system was undertaken, along with research into the problems of detection and tracking, hypersonic flight, and fuels suitable for use in an interceptor missile.

For example, the first steps of the final arming process for a ballistic missile depend on physical characteristics of the weapon release, such as the acceleration of a rocket launch, zero-gravity coasting, and various physical aspects of hypersonic reentry into the atmosphere.

* the high hypersonic land-based anti-ship ballistic missile variant of the DF-21

In 1995 at the 33rd Aerospace Sciences Meeting it was reported that tests were performed at an aerospike-protected missile dome to Mach 6, obtaining quantitative surface pressure and temperature-rise data on the feasibility of using aerospikes on hypersonic missiles.

BrahMos-2 is a stealth hypersonic cruise missile currently under development.

With a speed of Mach 7 it will have a speed double the speed of the current Brahmos-1, and it has accordingly been branded as the fastest hypersonic missile in the world

This in turn led to securing contracts for many advanced aerospace vehicles in the late 1950s-the X-15 manned hypersonic spaceplane, the Hound Dog missile, and the XB-70 Valkyrie triple-sonic bomber.

A problem is called subsonic if all the speeds in the problem are less than the speed of sound, transonic if speeds both below and above the speed of sound are present ( normally when the characteristic speed is approximately the speed of sound ), supersonic when the characteristic flow speed is greater than the speed of sound, and hypersonic when the flow speed is much greater than the speed of sound.

For example, while the behavior of hypersonic flow is understood, building a scramjet aircraft to fly at hypersonic speeds has seen very limited success.

The hypersonic regime is a subset of the supersonic regime.

One possibility is the air-breathing hypersonic spaceplane under development by NASA and other organizations, both public and private.

* Lift to drag ratios of vehicles at hypersonic speeds are poor whereas since acceleration is a vector, the effective lift to drag ratios of rocket vehicles at high g is not dissimilar.

No explosive is said to be used since the reentry vehicle's mass and hypersonic impact velocity provide sufficient mechanical energy and " effect ".

* The 2037 Bomber, an optionally manned, stealthy, hypersonic, heavy-bomber is scheduled to enter service this year, as the USAF calculates that attrition will have reduced their existing strategic bomber fleet below the minimum 170 aircraft.

The hypersonic regime is often alternatively defined as speeds where ramjets do not produce net thrust.

While the definition of hypersonic flow can be quite vague and is generally debatable ( especially due to the lack of discontinuity between supersonic and hypersonic flows ), a hypersonic flow may be characterized by certain physical phenomena that can no longer be analytically discounted as in supersonic flow.

Since the pressure gradient normal to the flow within a boundary layer is approximately zero for low to moderate hypersonic Mach numbers, the increase of temperature through the boundary layer coincides with a decrease in density.

The study of projectile impacts with hypersonic velocities greater than several kilometres per second is an area of active research.

He is responsible for many key advances in aerodynamics, notably his work on supersonic and hypersonic airflow characterization.

This fact is used extensively in rocketry where hypersonic flows are required, and where propellant mixtures are deliberately chosen to further increase the sonic speed.

A WaveRider is a hypersonic aircraft design that improves its supersonic lift-to-drag ratio by using the shock waves being generated by its own flight as a lifting surface, a phenomenon known as compression lift.

Although the term commonly refers to wireless data transfer mechanisms ( e. g. using radio, hypersonic or infrared systems ), it also encompasses data transferred over other media such as a telephone or computer network, optical link or other wired communications like phase line carriers.

PBS also has cryogenic test facilities and a hypersonic wind tunnel.

It was also intended to test thermal protection, navigation, guidance, control, deceleration and flotation systems, as well as study hypersonic aero-thermodynamics, management of communication blackouts, and recovery operations.

It is believed a new type of hypersonic travel is also being studied for the X-41 that will apparently be able to travel past Mach 7 and perhaps onto Mach 9.

* In the drama television series JAG, the Season Nine episode " The One That Got Away " ( original air date October 17, 2003 ) features the Aurora — which in the show is a super-secret hypersonic aircraft under development by the CIA that uses a pulse-detonation engine.

* Reaction Engines A2, a design study for a hypersonic airliner under development.

SABRE ( Synergistic Air-Breathing Rocket Engine ) is a concept under development by Reaction Engines Limited for a hypersonic precooled hybrid air breathing rocket engine.

HySTP was designed to transfer the accomplishments made in hypersonic technologies by the National Aero-Space Plane ( NASP ) program into a technology development program.

Langley is the lead center and is responsible for hypersonic technology development.

* Assessing the prospects for the development of hypersonic airliners, John Becker and Frank Kirkham of the National Aeronautics and Space Administrations ( NASAs ) Langley Research Center project that a 750, 000-pound ( 340, 198 kg ) hypersonic transport ( HST ) capable of Mach 6 speeds and carrying 300 passengers from Los Angeles, California, to Paris, France, in 2 hours 42 minutes could be operating by 1995.

Eggers specialized in hypersonic and spaceflight research including the development of new wind tunnel and ballistic range facilities.

The development of this engine lost focus in favor of the new hypersonic precooled turbojet engine ( PCTJ ).

Image showing shock waves from NASA's X-43A hypersonic research vehicle in flight at Mach 7, generated using a computational fluid dynamics algorithm. On September 30, 1935 an exclusive conference was held in Rome with the topic of high velocity flight and the possibility of breaking the sound barrier.

Thus jet engines, with a better match between speed and jet exhaust speed ( such as turbofans )— in spite of their worse )— dominate for subsonic and supersonic atmospheric use, while rockets work best at hypersonic speeds.

Stellar winds from young clusters of stars ( often with giant or supergiant HII regions surrounding them ) and shock waves created by supernovae inject enormous amounts of energy into their surroundings, which leads to hypersonic turbulence.

* Elwood " Woody " Norris ( Lemelson-MIT Prize ) for his invention of a hypersonic sound system, which allows sound to be focused with laser-like precision.

McDonnell made a number of missiles, including the unusual ADM-20 Quail, as well as experimenting with hypersonic flight, research that enabled it to gain a substantial share of the NASA projects Mercury and Gemini.

Twenty-nine planned Programmed Test Inputs ( PTIs ) were manually flown in the Control Stick Steering ( CSS ) mode, with Engle making use of his past manual hypersonic flying experience in the X-15.

The resultant high temperature hypersonic flow can be used to simulate atmospheric re-entry of spacecraft or hypersonic craft, again with limited testing times.

Because of these problems, waveriders have not found favor with practical aerodynamic designers, despite the fact that they might make long-distance hypersonic vehicles efficient enough to carry air freight.

McDonnell made a number of missiles, including the pioneering Gargoyle and unusual ADM-20 Quail, as well as experimenting with hypersonic flight, research that enabled them to gain a substantial share of the NASA projects Mercury and Gemini.

This research may have inspired the British HOTOL program, which rather than airbreathing to high hypersonic speeds as with NASP, proposed to use a precooler up to Mach 5. 5.

Concepts such as lifting bodies attempt to deal with the somewhat conflicting issues of reentry, hypersonic and subsonic flight ; as does the delta wing shape of the Space Shuttle.

The X-43 is an unmanned experimental hypersonic aircraft with multiple planned scale variations meant to test various aspects of hypersonic flight.

Inflation adjusted comparisons of the SpaceShipOne program with that of the X-15 budget, indicate that the Tier One program cost 1 / 100th that of the X-15 program, although the three X-15 aircraft made almost 200 test flights in their entire test program, typically exploring hypersonic flight between mach 4-7.

Using his knowledge about plasma physics and magnetohydrodynamics, Petit describes a model of hypersonic plane working with an MHD bypass system, claiming it would correspond to the mythic Aurora secret spyplane US Air Force would have brought into service in the 1990s.

The resultant high temperature hypersonic flow can be used to simulate atmospheric re-entry of spacecraft or hypersonic craft, again with limited testing times.

In these four modes and robot mode, he wields twin hypersonic concussion blasters, but his sixth mode – that of a winged wolf-creature – has no need for them, preferring to tear his opponents apart with its claws and fangs.

Over 80 % of the heating the Orbiter experiences during reentry is caused by compression of the air ahead of the hypersonic vehicle, in accordance with the basic thermodynamic relation between pressure and temperature.