日本无限资源_福禄影院午夜伦_美国av毛片_亚洲自拍在线观看_激情亚洲一区国产精品_999久久久久

U.S. researchers develop first-ever plane not using fossil fuels or batteries

Source: Xinhua| 2018-11-22 01:44:31|Editor: yan
Video PlayerClose

WASHINGTON, Nov. 21 (Xinhua) -- American researchers developed and flew the first-ever plane with no moving parts like propellers, turbines or fans which are powered by the combustion of fossil fuels or by battery packs.

The study published on Thursday in the journal Nature described the light aircraft powered by "ionic wind," a silent but mighty flow of ions that could generate enough thrust to propel the plane over a sustained, steady flight.

"This has potentially opened new and unexplored possibilities for aircraft which are quieter, mechanically simpler, and do not emit combustion emissions," said Steven Barrett, associate professor of aeronautics and astronautics at Massachusetts Institute of Technology (MIT).

The researchers expected to develop the ion wind powered drones in the near term and to pair the ion propulsion with conventional combustion system to create more fuel-efficient passenger planes in the future.

The ionic wind, also known as electroaerodynamic thrust, is a physical principle that was first identified in the 1920s.

It describes a wind that can be produced when a current is passed between a thin and a thick electrode. If enough voltage is applied, the air in between the electrodes can produce enough thrust to propel a small aircraft.

People assumed that it would be impossible to produce enough ionic wind to propel a larger aircraft over a sustained flight, according to Barrett.

His team produced a large glider weighing about five pounds or 2.27 kilograms and having a five-meter wingspan. The aircraft carries an array of thin wires strung along and beneath the front end of the plane's wing.

The wires are used as positively charged electrodes and similarly arranged thicker wires, running along the back end of the plane's wing, serve as negative electrodes, according to the study.

The fuselage of the plane has a stack of lithium-polymer batteries and a power supply that can convert the batteries' output to a sufficiently high voltage (40,000 volts) to propel the plane.

The researchers flew the plane a distance of 60 meters across a gymnasium and found the plane produced enough ionic thrust to sustain flight the entire time.

Barrett's team is working on producing more ionic wind with less voltage and increasing the design's thrust density.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011105521376228081
主站蜘蛛池模板: 国产v日韩v欧美v在线观看 | 精品视频只有精品高清6 | 国产成人综合在线女婷五月99播放 | 国产suv精品一区二人妻 | 久久嫩草精品久久久久 | 国产在线精品一区二区中文 | 无套免费观看大象视频 | 高清av熟女一区 | 欧美熟妇的荡欲在线观看 | 91精品啪在线观看国产线免费 | 亚洲欧美综合一区二区 | 狠狠色丁香婷婷综合尤物 | 日韩欧美视频免费在线观看 | 亚洲国产aa | 亚洲网站在线观看视频 | 久久国产大片 | 国产大学生一级毛片绿象 | 欧美激情在线观看一区二区三区 | 国产亚洲综合AA系列 | 午夜视频中文字幕 | 亚洲人xxxxxlmedjyf | 久久精品视频导航 | 男人的好看免费观看在线视频 | 中国熟妇毛茸茸xxxxx | 新超碰在线 | 国产精品一区人妻精品阁在线 | 国产AV无码专区亚洲AV桃花庵 | 五月婷激情| 办公室揉弄高潮嗯啊免费视频 | 精品三级在线 | 中文字幕成熟丰满人妻 | 好好的日在线视频观看 | a级黄色录像片 | 日本不卡一区二区三区在线 | 992tv在线观看视频 | 久久久久国产精品免费免费搜索 | 精品久久久久久久毛片微露脸 | 亚洲色大成网站WWW永久男同 | 国产强奷女交警在线播放 | 欧美在线观看免费观看视频 | 日本高清不卡一区二区三区视频 |