These have always been the goals of aircraft designers from the very beginning of aviation history. Even today engineers and researchers attempt to build aircraft that will be able perform better. Throughout the history of aircraft design, the main limiting factor has been the performance of power plants. This is still going on today as we attempt to build engines that allow superior performing aircraft. Scramjet engines offer one potential solution to this problem. By the end of World War II we had the technology to build airframes that would fly higher, go further, faster and carry more, but there were no power plants available to power such aircraft. With the introduction of the jet engine aircraft took an enormous step forward. Although the jet engine offers a multitude of advantages over jet engines, there are still limitations. One of these is that jet engines have a limited operating speed. A speeds much higher than Mach 3 the turbine engines, with rotating blades and other moving parts are unable to stand the stress and pressures associated with high speed flight. Rocket power has been used in some applications. Some of these include experimental aircraft such as the X-15. Rocket power is also used in spacecraft as the main means of propulsion. Rocket powered aircraft must carry a supply of hydrogen and oxygen. The requirement to carry large supplies of fuel severely limits the payload capabilities of the ship. In addition it is cost prohibitive for most operations. Commercial transportation is out of the question. Ramjet engines offer some improvements, but are still speed limited. A ramjet engine works in a similar manner to a turbine engine, but there are no moving parts. Instead of using a compressor section to produce high-density air, the forward speed of the aircraft is used to compress the air. The air is then slowed to subsonic speed through a reverse venturi. Fuel is ignited and creates thrust is a fashion similar to that of a turbine engine.
Finally, there is the fifth jet engine, the Scramjet. The name Scramjet, stands for "supersonic combustion Ramjet." ... The Scramjet is made to attain hypersonic speeds at up to Mach 5. It is not currently used in any aircraft, but is currently being built into the Hyper X test aircraft, which when finished, will be the first hypersonic scramjet powered aircraft. ...
HYPERSONIC ENGINE: (A Hypersonic engine is defined as an engine that can fly at more than mach 5.0) There are three types of hypersonic engine being developed: THE RAMJET AND SCRAMJET: A ramjet has no moving parts and achieves compression of intake air by the forward speed of the air vehicle. ... Scramjet engines are the newest form of propulsion from the jet propulsion family. ... They main difference between the ramjet and scramjet engine is their air intake, the Scramjet's intake will only compress the air at hypersonic speeds, whereas the ramjet engine will compress the air prope...
In 1977, the Oldsmobile division of General Motors sold a car model called the Delta 88. Consumers were given an option regarding the powerplant for this car. The vehicle could come equipped with a V-6 engine or it could come with a high-performance V-8. The V-8 engine had a 350 cubic inch displa...
On a day-to-day basis people like you and I choose to take to the skies for varying reasons. Some reluctantly, others with no concern for their safety at all. Fear is often associated with flying in general. Many of us have fears associated with the loss of loved ones; some others have fear as a result of the media. Whatever your reason for fearing aviation is you must remember that you are placing your trust into the hands of someone that you probably haven't even met before. ...
It is overall known that the 20th century is the century of technological development for the human race. People who has lived in the early years of this century and whose quickiest way to get to another place has been riding a horse wouldn't believe that they are still on the earth, if they had the opportunity to come to the present and see hypersonic airplanes of today's world. According to the fact that the human race who couldn't rise even three meters high from the face of the earth along thousands of years, until the start of the 20th century,...
During the late 1800's there began some serious competition between 2 major electrical companies, they were Westinghouse and Edison. Because Edison was infamous for his inventions and contributions for DC current, DC was the first generator used to power the homes in a town. Because of Edison's suc...
Why are we as Americans so afraid to change? Even if it is a change for the better? The world has been using oil coal and other petroleum products to power just about everything that moves for the last 150 years. Yet most cars in the United States only get 10-20 miles a gallon and even the "good" on...
In the 21st century, people are more and more concerning about the environment issues. For example, many car manufacturers are doing the research on the green power cars. Certainly, the aviation industry is not an exception. If you take the flight, you will create 280 kilograms carbon per 1000 kilom...
The advantages of electric automobiles Based on recent discoveries in the fields of environmental pollution and automobile research, conclusions can be made that electric cars are more beneficial to the environment and with progress will be more beneficial to the consumer as well. With the inven...