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Hypersonic flight is flight through the atmosphere below altitudes of about 90 km (56 mi) at speeds greater than Mach 5, a speed where dissociation of air begins to become significant and high heat loads exist. Speeds over Mach 25 have been achieved below the thermosphere as of 2020. [1]
In Hermeus’s hypersonic design, a ramjet, which can only operate at high speeds as it uses this air to pressurize air and fuel in the combustion chamber, kicks in and carries the theoretical ...
Unfortunately, the current regulatory landscape is simply not ready for testing hypersonic aircraft. More accurately, the pace of testing the U.S. achieved in the 1950s and 1960s is now stymied by ...
In December 2014, NASA awarded Lockheed Martin a contract to study the feasibility of building the SR-72's propulsion system using existing turbine engine technologies, The $892,292 (~$1.13 million in 2023) contract funded a design study to determine the viability of a TBCC propulsion system by combining one of several current turbine engines, with a very low Mach ignition Dual Mode Ramjet (DMRJ).
Project Mayhem, the Air Force's secret new hypersonic bomber, is underway. Development on the bomber, which travels at Mach 10, just took a big step forward.
Small-scale model of the Soviet/Russian Ayaks aircraft exposed at the 1993 MAKS Air Show, Moscow. It is still currently under development. 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 ...
Currently the Air Force’s remaining hypersonic project of record is the air-breathing HACM cruise missile, which at least has potential to be more affordable and stealthy than a hypersonic glide ...
The 14-X is a Brazilian scramjet engine in development by the Aerothermodynamics and Hypersonics Laboratory Henry T. Nagamatsu of the Institute of Advanced Studies (IEAv) of the Department of Aerospace Science and Technology as part of the PropHiper (Portuguese: Projeto de Propulsão Hipersônica 14-X).