New breakthroughs in the electric aircraft industry or ushered in major development
According to Hong Kong's "Wen Wei Po" reported on September 21, the aircraft fans have recently opened their eyes. First, from July onwards, they first witnessed the solar aircraft "Sunshine Power 2" across the Pacific Ocean (Japan flies directly to Hawaii), and then Airbus Electric The plane E-Fan successfully flew over the British Channel, marking that electric planes are no longer an unreachable dream. Electric aircraft are not only quieter, more environmentally friendly and efficient than traditional aircraft, but also quite different from traditional aircraft designs. Aviation technology has made rapid progress in the last century. The industry is now counting on electric aircraft to bring a second "golden age" to aviation development, opening a new page in aviation history.
According to the report, electric propulsion technology has more advantages than traditional piston engines or turbo engines. For example, the electronically controlled state-of-the-art electric engine can provide a large amount of torque, which can effectively promote propellers, blades and tires. Electric motors require fewer parts and reduce the chance of wear or breakage of parts. But what is most exciting for the aviation industry is that electric propulsion has the ability to break existing aircraft design constraints, making some concepts that subvert traditional aircraft design come true, and the mystery lies in "distributed electrical propulsion" (DEP).
According to reports, the concept of "distributed electric propulsion" is to replace the bulky jet engine of the existing aircraft with a series of electric power propellers, and it does not have to be installed under the wing, and can be set at different positions on the fuselage as needed. In addition to allowing the creation of aircraft with very different appearances, it also reduces wing area and weight and saves fuel. At the same time, each power propeller can be controlled and operated separately. By adjusting the thrust of different parts of the aircraft, the pilot can better cope with changes in the flight environment, such as sudden strong winds or air currents.
The US Space Agency (NASA) has used DEP to build a small aircraft, the Sceptor, which is scheduled to begin testing in 2017. Moore, who has been researching new aircraft designs at NASA for more than 30 years, said that "distributed electrical propulsion" will fundamentally change the aircraft design. If the Sceptor test is successful, this technology is expected to be integrated into small passenger aircraft within 10 years, and they will achieve zero emissions. And extremely quiet, operating expenses will be 30% less than now.
The electric aircraft concept can be traced back to West Germany in 1973, until the aviation industry has made continuous breakthroughs in recent years, making electric aircraft more and more hopeful to be put into use. In addition to the aforementioned "Sunshine Power 2" and E-Fan, the two-seat electric aircraft E-Genius developed by the University of Stuttgart in Germany also successfully traveled to Germany and Italy in July this year, becoming the first all-electric flying over the Alps. aircraft.
At present, electric aircraft still have a number of major technical obstacles to overcome, the most difficult of which is battery capacity and thrust. Although the battery technology has developed rapidly in recent years, there is still a significant gap between the endurance and the traditional aircraft. For example, the lithium-ion battery used by E-Fan can only support about one hour of flight. On the other hand, the technology and research of superconductors is not enough to provide the ideal thrust for the aircraft, making the electric aircraft still difficult to compare with the traditional aircraft in performance. However, the aviation industry generally believes that the life expectancy of civil aviation aircraft is as long as 20 to 30 years, so everyone is eager to look to the future. The industry is generally optimistic about the development prospects of electric aircraft and its technology.
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