Reaction Engines are a privately owned British company which receives modest funding from the UK govt and also a smaller amount from the European Space Agency. The SABRE engine test is a success ! Reaction Engines has attracted development funding from the British government, the U.S. Defense Advanced Research Projects Agency (DARPA) and the European Space Agency, among others. September 25, 2017 – Reaction Engines Inc., the U.S. subsidiary of Reaction Engines, today announced that it has received a contract from the U.S. Defense Advanced Research Projects Agency (DARPA) to conduct high-temperature airflow testing in the United States of a Reaction Engines precooler test article called HTX. The company conducts research into space propulsion systems, centred on the development of the Skylon re-usable SSTO spaceplane. History and personnel. Hopefully the fact that this latest test was carried out in the USA in collaboration with DARPA isn’t an indication that this project will slip away from British/European control. In this case, Reaction Engines, one of the mentions in the post challenger thread, just let the world know they got money from DARPA to test their precooler tech.

Air Force Reveals Tests Of Supposed Record-Setting Scramjet Engine From Northrop Grumman The new design produced more thrust than any … Reaction Engines' precooler tech demo chills 1,000°C air in less than 1/20th of a second ... — Reaction Engines Ltd ... supported by the Defense Advanced Research Projects Agency (DARPA).

This marks the first phase of high-temperature testing, a significant milestone in the development of the company’s SABRE engine that hopes to revolutionise hypersonic flight. DARPA is now beginning to narrow in on a design for the XS-1, an experimental spaceplane that would allow quick, relatively inexpensive access to orbital altitudes. Reaction Engines recently received a contract award from the US Defense Advanced Research Projects Agency (DARPA) to conduct the HTX tests, which follow successful testing of the pre-cooler heat exchanger at ambient temperature conditions.

Which raises a bit of an eyebrow, to be sure. The engine is being designed to achieve single-stage-to-orbit capability, propelling the proposed Skylon spaceplane to low Earth orbit. Vorkühler sind eine der Schlüsseltechnologien für SABRE. Reaction Engines, Inc. recently received a contract award from the Defense Advanced Research Projects Agency (DARPA) to conduct the HTX tests, which are designed to build upon previous successful testing of the precooler heat exchanger at ambient temperature conditions. The main difficulty is to design a very efficient heat exchanger. This idea differs mostly in that the plane itself reaches orbit, switching from jet to rocket propulsion. Reaction Engines has successfully tested its precooler, a component of its air-breathing rocket engine, at conditions representing Mach 5.

RE is a British company.

Reaction Engines has a potential spaceplane of its own, the Skylon. It must be able to cool the air entering the reactor at -150 degrees in a fraction of a second. Re: The Reaction Engines Skylon/SABRE Master Thread (6) « Reply #710 on: 10/05/2017 04:30 pm » So, decades of work by dedicated UK scientists and engineers, along with £60 million of UK taxpayers money, has ended up in a secret US military programme. Reaction Engines’ demonstration pre-cooler heat exchanger on the test stand. Reaction Engines, the company working on SABRE and Skylon, tries to develop this technology since a long time. Reaction Engines has successfully tested its precooler, a component of its air-breathing rocket engine, at conditions representing Mach 5. The HTX hot heat exchanger test programme was supported under a contract to the Company’s US subsidiary Reaction Engines Inc. by the Defense Advanced Research Projects Agency (DARPA).

Reaction Engines, Inc. recently received a contract award from the Defense Advanced Research Projects Agency (DARPA) to conduct the HTX tests, which are designed to build upon previous successful testing of the precooler heat exchanger at ambient temperature conditions.