The SR-72 is a proposed hypersonic reconnaissance and strike aircraft concept that has been discussed publicly by Lockheed Martin. It is intended to be a successor to the famous SR-71 Blackbird, which was a high-speed reconnaissance aircraft.

It is worth noting that the development and testing of advanced aerospace technologies, including hypersonic aircraft, often involve classified programs that are not publicly disclosed. These programs are conducted to enhance national security and maintain a technological edge.

If there have been recent developments in the field of hypersonic aircraft or any classified programs related to this technology, it would be advisable to refer to official announcements from relevant authorities or trusted news sources for the most up-to-date and accurate information.

The Quarterhorse has broken new grounds and the United States Air Force is more than impressed. So much so that they’ve awarded the start-up company a $60-million contract to flight-test the Quarterhorse.

The Quarterhorse is estimated to travel Mach 5 speeds – five times the speed of sound – on a single go and is based on the Turbine-Based Combined Cycle – TBCC – engine, which combines a supersonic turbojet engine with a scramjet, which is simply a supersonic combustion ramjet engine.

This engine configuration means the Quarterhorse would perform effortlessly well at whatever speeds – be it the relatively low commercial airline speeds of today or at hypersonic speeds that would leave even fighter jets in the dust.