Three Important Facts About Supersonic Jets
Super sonic jets is an aircraft able to fly faster than the speed of sound. Vehicles that fly at supersonic speeds are flying faster than the speed of sound. The speed of sound is about 1,236 kilometres at sea level. Supersonic jets includes speeds up to five times faster than the speed of sound. In 1947, Air Force Captain Charles E. Chuck Yeager became the first person to fly an aircraft faster than the speed of sound. Supersonic flight is one of the four speeds of flight. They are called the regimes of flight. The regimes of flight are subsonic, transonic, supersonic and hypersonic. NASA researches can fly actual supersonic aircraft that have been modified for research experiments. Learning more about supersonic flight helps NASA design aircraft to perform better at supersonic speeds. It can also help in the design of new vehicles used to explore space. Space vehicles fly at supersonic speeds too. Sonic Boom which is the shock wave that is produced by an aircraft or other object flying at a speed equal to or exceeding the speed of sound and that is heard on the ground as a sound like a clap of thunder. Here are a few points about Super sonic Jets.
To keep drag low, wing span must be limited. Which also reduces the aerodynamic efficiency when flying slowly. Since a supersonic aircraft must take off and land at a relatively slow speed, its aerodynamic design must be a compromise between the requirements for both ends of the speed range. For Supersonic jets wings are most helpful to fly more speed for it.
Another problem is the heat generated by friction as the air flows over the aircraft. Most supersonic designs use aluminium alloys such as duralumin, which are cheap and easy to work but lose their strength quickly at high temperatures. Most supersonic aircraft, including many military Fighter aircraft, are designed to spend most of their flight at subsonic speeds and only to exceed the speed of sound for short periods such as when intercepting an enemy aircraft or dropping a bomb on a ground target. A smaller number such as the Lockheed SR-71 blackbird bmilitary reconnaissance aircraft and the Concorde supersonic civilian transport are designed to cruise continuously at speeds above the speed of sound, and with these designs the problems of supersonic flight are more severe.
Many early supersonic aircraft, including the very first, relied on rocket power to provide the necessary thrust, although rockets burn a lot of fuel and so flight times were short. Early turbojets were more fuel-efficient but did not have enough thrust and some experimental aircraft were fitted with both a turbojet for low-speed flight and a rocket engine for supersonic flight. The invention of the afterburner in which extra fuel is burned in the jet exhaust made these mixed power plant types obsolete and none entered production. The turbofan engine passes additional cold air around the engine core, further increasing its fuel efficiency, and most supersonic aircraft have been powered by turbofans fitted with afterburners. Supersonic aircraft usually use low bypass turbofans as they give good efficiency below the speed of sound as well as above or if extended super cruise is needed turbojet engines are desirable as they give less nacelle drag at supersonic speeds. Another high-speed power plant is the ramjet. This needs to be flying fairly fast before it will work at all. The heating effect of friction at these speeds meant that a special fuel had to be developed which did not break down in the heat and clog the fuel pipes on its way to the burner.