SR-71 reconnaissance plane set a myth of zero shooting down!

SR-71 reconnaissance plane set a myth of zero shooting down in actual combat record

Reconnaissance plane is a military aircraft specially used to obtain information from the air, and it is one of the main reconnaissance tools in modern warfare. The SR-71 reconnaissance plane, as the first practical jet plane that successfully broke through the thermal barrier, is a long-range high-altitude high-speed strategic reconnaissance plane used by the US Air Force. In actual combat records, this plane has set a myth that no aircraft has ever been shot down by enemy planes or anti-aircraft missiles.

This aircraft is developed and produced by the Skunk Factory of Lockheed Company in the United States, nicknamed Blackbird, with 32 aircraft produced by * * *. The aircraft has a range of 6, kilometers, carrying an auxiliary fuel tank for more than 7, kilometers, with a maximum flight speed of Mach 3.35, which can maintain a supersonic cruise of Mach 2.3 and a maximum flight altitude of 25,9 meters. This aircraft and its predecessor A12 ox cart carry too many legends in the history of human aviation and maintain many world records.

This machine adopts a lot of advanced technologies at that time, and its appearance is very sci-fi. Because 93% of the fuselage structure of the aircraft is made of titanium alloy, it is more resistant to high temperature. In order to reduce the cost, the titanium alloy which can be softened at a lower temperature and processed easily will be painted dark blue to enhance the thermal radiation cooling and camouflage effect at high altitude.

when the plane flies at the speed of 3 times the speed of sound, the friction with the air will generate a lot of heat, and some parts of the plane will even be heated to over 54℃, and the black paint can help SR-71 to lower the temperature.

Because of the design of the ridges on both sides, the extra lift can be greatly generated, that is, the installation angle of the delta wing can be reduced to obtain higher stability and lower high-speed resistance, and the fuel load can be increased to obtain a longer voyage. This design is reflected in many of the latest stealth drones, which allows them to have stability and invisibility without a tail.

As the core of the machine, the position of the engine can be imagined, and at that time, the function reached such a height thanks to the engine. This aircraft uses two Pratt & Whitney J-58 engines, and it is also the only military engine that can continuously use afterburner. When the flight speed is lower than the speed of sound, the variable circulation pipeline is closed, and it works like an ordinary turbojet engine with afterburner.

Inhale, compress, burn, propel the turbine, burn in the afterburner, and inject air. When the flight speed is higher, most of the compressor work is completed by supersonic inlet, and most of the airflow is directly injected into the afterburner through variable circulation pipes without passing through the main combustion chamber, which greatly improves the fuel efficiency. Each J-58 can generate 151 kn of thrust, so it is the most fuel-efficient when it is in maximum ride.