Russia's PJSC Tupolev (created on the basis of the design bureau headed by Soviet aircraft designer and engineer Andrei Tupolev) has received a patent for a hypersonic aircraft.
The patent materials note that the aircraft received a power plant consisting of three turbojet engines. Two of them run on traditional aviation kerosene, the third on cryogenic fuel (low-boiling liquid rocket fuel, one of the components of which is at a temperature below -153.15 °C - editor's note www1.ru).
It is noted that with the help of cryogenic fuel, the aircraft safely accelerates to hypersonic speed. In particular, during flight, the parts of the aircraft experience friction, which is accompanied by their heating.
For cooling, cryogenic fuel is supplied from the tank, as a result of an endothermic process, heat is absorbed, and the heated cryogenic fuel turns into a gas, then enters the engine's combustion chamber and creates thrust.
The patent indicates that liquefied natural gas (LNG) can act as a high-quality cryogenic fuel. One of the authors of the invention is listed as Valery Benderov, a leading engineer at the company.
Earlier it was reported that radiomagnetic indicators were developed for Tu-214 passenger aircraft, which will allow pilots to make a safer landing of the aircraft.