久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

Science and Health

Soaring on sun power

(China Daily)
Updated: 2010-04-09 08:23
Large Medium Small

Prototype plane's test in Switzerland sets stage for around-the-world flight attempt

PAYERNE, Switzerland - A solar plane with wings as wide as a 747 and the power of a small motorboat took to the skies for the first time Wednesday, cruising a mile high at bicycle-like speeds for nearly 1-1/2 hours in a step toward becoming the first sun-powered aircraft to circle the world.

Soaring on sun power
Bertrand Piccard (right), pilot and president of Solar Impulse and Andre Borschberg (left), CEO and pilot of the company, congratulate German test pilot Markus Scherdel after their solar-powered prototype airplane's first flight this week. [Agencies] 

In its maiden test flight, "Solar Impulse" - designed by Swiss adventurer Bertrand Piccard's team - completed a series of turns, slip maneuvers and bank angles reaching 5 degrees. Most importantly, it proved able to take off and land. The team plans to fly it around the world in 2012.

"There has never been an airplane of that kind that could fly - never an airplane so big, so light, using so little energy," said Piccard, who in 1999 copiloted the first nonstop round-the-globe balloon flight. "So there were huge question marks for us."

At a military airport in the Swiss countryside, the plane lifted off after at a speed no faster than 45 kph (28 mph) after only a short acceleration on the runway. It slowly gained altitude above the green and beige fields, and disappeared eventually into the horizon as villagers watched from the nearest hills.

Soaring on sun power
The solar-powered Solar Impulse HB-SIA prototype airplane sweeps in front of the Swiss Alps on its maiden flight this week. [Agencies]

Soaring on sun power


The descent was even slower, as the sun-powered craft hovered ahead of the runway for a couple of minutes before touching down to cheers from spectators.

The weather for the maiden flight was sunny, and there was little wind.

The 70 million euro project has been conducting flea-hop tests since December, taking the plane no higher than 60 centimeters (2 feet) in altitude and 300 meters (1,000 feet) in distance. A night flight is planned before July, and then a new plane will be built based on the results of those tests.

The big takeoff is planned for 2012, and it will use not an ounce of fuel.

"The goal is to fly day and night with no fuel, the goal is to demonstrate the importance of renewable energies, to show that with renewable energies we can achieve impossible things," said Piccard, who monitored but didn't pilot Wednesday's test run.

Test pilot Markus Scherdel said the plane isn't designed for maneuvers, but showed it was able to take off and land safely with handling like a passenger jet.

"Everything worked as it should," he said.

Using almost 12,000 solar cells, rechargeable lithium batteries and four electric motors, Piccard and copilot Andre Borschberg plan to take the plane around the world with stops to allow them to switch over and stretch after long periods in the cramped cockpit.

The circumnavigation will take time.

With the engines providing only 40 horsepower, the plane will fly almost like a mo-ped in the sky, at an average flight speed of 70 kph (44 mph). The trip will be split up into five stages - keeping the plane in the air for up to five days at a time - with the stopovers also allowing the team to show off their creation.

Solar flight isn't new but Piccard's project is the most ambitious.

In 1980, the fragile Gossamer Penguin ultra-lightweight experimental solar plane flew short demonstration flights with one pilot on board. A more robust project called the Solar Challenger flew one pilot from France to England in a five-hour-plus trip in 1981.

Solar plane technology recalls the early days of manned flight, and the slow ascent of the Solar Impulse was somewhat reminiscent of the Wright brothers pioneering experiments over a century ago.

"The first crucial question was: Do we have enough power to fly?" said Borschberg. "The second crucial thing was: Are we capable of landing this airplane, is it controllable?"

"It was two hours of deep emotion," he added, calling it the high point of seven years of work on the project. "The airplane has landed but we have not yet landed."

Borschberg followed the flight in a helicopter; below waited numerous people involved with the project and Piccard, who comes from a long line of adventurers. His late father Jacques plunged deeper beneath the ocean than any other man, and grandfather Auguste was the first man to take a balloon into the stratosphere.

Solar Impulse said the flight reached an altitude of 5,500 feet (1,676 meters). After landing, Scherdel emerged from the cockpit with his arms raised and the team broke open bottles of champagne.

"It went so silent, so soft," Piccard said.

He acknowledged the role of good weather, however.

Because the solar panels are needed for day flying and for charging the 400-kilogram (882-pound) lithium batteries that power the plane by night, it relies on sunshine, and Piccard said his team will have to scrupulously monitor conditions and divert routes to avoid storms.

"Round-the-world will seem impossible until we do it," Piccard said. "Today is an absolutely incredible milestone."

Associated Press

久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    五月婷婷激情久久| 欧美丝袜在线观看| 99热一区二区| 一本二本三本亚洲码| 男人添女荫道口女人有什么感觉| 2018国产在线| 天天操天天爱天天爽| 国产高清免费在线| 1024精品视频| 中文字幕一区久久| 日韩精品一区在线视频| 亚欧美在线观看| 中文字幕制服丝袜在线| 国产成人艳妇aa视频在线| www.国产在线播放| 久久撸在线视频| 国产在线播放观看| av亚洲天堂网| 免费一级特黄特色毛片久久看| 一区二区三区韩国| 丁香六月激情网| 亚洲天堂2018av| 成人免费视频91| 天堂av在线8| 波多野结衣之无限发射| 天天看片天天操| aa视频在线播放| 欧美在线aaa| 少妇一晚三次一区二区三区| 国产日韩欧美久久| 日本www在线视频| 亚洲av综合色区| 一级黄色香蕉视频| 加勒比成人在线| 黄色a级三级三级三级| 无码aⅴ精品一区二区三区浪潮| 一本二本三本亚洲码| 污污的网站18| 国产原创popny丨九色| 做爰高潮hd色即是空| 激情综合网婷婷| 人人妻人人澡人人爽欧美一区 | 99热久久这里只有精品| 高潮一区二区三区| 日韩av一二三四区| 日本一区二区三区四区五区六区| 91n.com在线观看| 精品视频免费在线播放| 一本大道东京热无码aⅴ| 加勒比av中文字幕| 一区二区三区免费播放| 情侣黄网站免费看| 中文字幕日本最新乱码视频| 麻豆传媒网站在线观看| 在线免费观看视频黄| 欧美亚洲黄色片| 成人国产在线看| 1314成人网| av中文字幕网址| 成人性生生活性生交12| 免费大片在线观看| 国产肥臀一区二区福利视频| 日韩精品一区二区免费| 青青草视频国产| 色婷婷成人在线| 高清在线观看免费| 成人一对一视频| 97国产精东麻豆人妻电影| 精品欧美一区免费观看α√| 欧美无砖专区免费| 欧洲精品在线播放| 欧美午夜性视频| 国产欧美日韩网站| 免费毛片小视频| 国产成人黄色片| 日韩在线视频在线观看| 看av免费毛片手机播放| 蜜臀精品一区二区| 99国产精品白浆在线观看免费| 国产亚洲精品久久久久久久| 免费网站在线观看视频| 国产精品久久久久久久乖乖| 精品人妻大屁股白浆无码| 久艹视频在线免费观看| 国产深夜男女无套内射| 免费观看日韩毛片| 日日摸天天爽天天爽视频| 久久久久免费精品| 三级a三级三级三级a十八发禁止| 三级av免费观看| 一级全黄肉体裸体全过程| www.69av| 黄色一级视频片| 日韩一级免费在线观看| 中文久久久久久| 亚洲综合婷婷久久| 亚洲国产精品女人| 成人午夜精品久久久久久久蜜臀| 欧美 国产 日本| 免费一区二区三区在线观看| 国产精品美女在线播放| 国产三级中文字幕| 免费一级特黄毛片| 成人小视频在线看| 中文字幕有码av| 老司机av福利| 91成人在线观看喷潮教学| 亚洲少妇第一页| 亚洲综合激情五月| 狠狠干 狠狠操| 天天操天天爽天天射| 手机成人av在线| 日韩精品一区在线视频| 成年网站在线播放| 日韩国产精品毛片| 男人靠女人免费视频网站| 久久人人爽av| 国产毛片久久久久久国产毛片| 久久久久久久久久久久久国产精品| 北条麻妃在线视频观看| 国产精品中文久久久久久| 国产免费黄色小视频| 中文字幕 日韩 欧美| 欧美人成在线观看| 亚洲精品久久久中文字幕| 久久亚洲国产成人精品无码区| 日韩视频免费播放| 日韩免费毛片视频| 午夜视频在线观| 国产极品在线视频| 91香蕉国产线在线观看| 大肉大捧一进一出好爽视频| 樱花草www在线| 99999精品视频| 激情成人在线观看| 激情综合网婷婷| 91精品一区二区三区四区| 久久精品网站视频| 成人一级生活片| 四虎成人在线播放| 久久综合久久色| 亚洲乱码日产精品bd在线观看| 欧美日韩一道本| 精品一区二区三区毛片| 亚洲三级视频网站| 激情深爱综合网| 成年在线观看视频| 中文字幕在线视频精品| 国产女主播自拍| 中文字幕在线视频一区二区| 中日韩av在线播放| 午夜宅男在线视频| 国产小视频精品| 激情 小说 亚洲 图片: 伦| 天天天干夜夜夜操| 亚洲一区二区三区四区五区xx| 中文字幕无码不卡免费视频| 久久精品99国产| 国产欧美高清在线| 国产真实乱子伦| 成人午夜激情av| 日本黄大片一区二区三区| 天天影视色综合| 亚洲自拍偷拍一区二区三区| 国产成年人在线观看| 色婷婷777777仙踪林| 国产欧美123| 免费毛片网站在线观看| 国产二区视频在线播放| 麻豆av免费在线| 男女啪啪网站视频| 男生操女生视频在线观看| 伊人精品视频在线观看| 国产一二三四区在线观看| 久久久久福利视频| av在线播放亚洲| 女人另类性混交zo| 亚欧激情乱码久久久久久久久| 国产免费中文字幕| 狠狠精品干练久久久无码中文字幕| www.亚洲成人网| 欧美 丝袜 自拍 制服 另类 | 久久久久久综合网| 视频一区二区视频| 国产a级片网站| 日韩中文字幕组| 伊人免费视频二| 国产成人艳妇aa视频在线 | 中文字幕55页| 丁香六月激情婷婷| 欧美两根一起进3p做受视频| 日韩不卡一二三| 五月天激情图片| 国产免费一区二区三区视频| 成 人 黄 色 小说网站 s色| 国产乱叫456| 僵尸世界大战2 在线播放| 超碰影院在线观看| 精品国产无码在线| 337p粉嫩大胆噜噜噜鲁|