American company GE Aviation intends to end 2020 to start testing individual elements of the turbojet engine Affinity that you plan to install on advanced supersonic passenger aircraft of the company Aerion AS2 Supersonic. As reports Flightglobal, in particular, to the end of the year will begin testing the combustion chamber and the system of emission of exhaust gases.
Development of the Affinity engine is in 2018. Developers attribute the new power plant to the engine with medium bypass ratio. Affinity will get two fans and can develop a thrust of up to 89 kN. The engine will be able to work at height of up to 18.3 thousand meters.
Technical details about the promising engine, the developers have not disclosed. Earlier it was reported that the development of Affinity will be fully completed in 2023. The first flight of the AS2 is scheduled for 2024, and to enter his service is planned for 2026.
For flight at supersonic speed of a conventional turbofan engines of modern passenger aircraft are not suitable. Due to the large area of fan, the characteristics of the compressor and many other reasons conventional engines in the majority or are not able to reliably operate at supersonic flight speed, or not at all can overclock up to her aircraft.
The development of passenger aircraft AS2 Aerion is conducted by the company in 2014. According to preliminary calculations, the length of the plane will be of 51.8 meters height — 6.7 meters, and the wingspan is 18.6 meters. Maximum takeoff weight of supersonic aircraft will amount to 54.8 tons. AS2 will be equipped with three engines, each thrust of which, according to the developers, should be not less than 69 kN.
The plane is designed to carry up to 12 passengers. AS2 will fly over water at a cruising speed of 1.4 — 1.6 Mach, slowing down to 1.2 over land. Some less flight speed over land coupled with the special aerodynamic airframe will allow, as I expect the developers to almost completely avoid the formation of shock waves.
The flight range of the aircraft at the speed of 1.4 Mach number will be 7.8 thousand kilometers and 10 thousand kilometers at the speed of 0.95 Mach number. Current international rules prohibit the flight of supersonic aircraft over populated land areas.