<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          USEUROPEAFRICAASIA 中文雙語Fran?ais
          Opinion
          Home / Opinion / Op-Ed Contributors

          Flying car is a good idea but hard to realize

          By Zhang Zhouxiang | China Daily | Updated: 2017-08-19 09:25

          Flying car is a good idea but hard to realize
          Editor's note: Zhejiang Geely Holding Group Co's plan to purchase Terrafugia, a US-based startup company that made the world's first flying car, was recently approved by US government departments. Will flying cars help ease traffic jams in China? Two experts share their views on the issue with China Daily's Zhang Zhouxiang: Excerpts follow:

          Not likely to be a hit with consumers

          Flying car is a good idea but hard to realize
          Lin Haiying, a senior researcher in automobiles at Beihang University

          The idea of a flying car seems creative. Combining the advantages of planes and cars, a flying car requires much smaller parking space than a plane and is more convenient than a car, especially when it comes to maneuvering traffic jams.

          In general, two types of flying cars have been developed. The first is a fixed-wing flying car, with the most typical model being "Transition" of Terrafugia that Geely is purchasing. It is more like a small plane with collapsible wings, which can fly to avoid traffic jams and travel on the road when approaching the destination. It has quite a long flying range, from 500 kilometers to 600 km.

          The other is rotor-wing flying car, something like a small helicopter. It has two rotor wings, one on the top and the other at the back, which help it to fly. The wings can be folded on landing and the vehicle can be driven on the road. One such typical model is "Liberty Sport" made by PAL-V in the Netherlands. Compared with Transition, it needs a narrower lane and smaller stretch of road for takeoff and landing, but its flying range is only about 200 km.

          The technologies used to design and manufacture flying cars have matured, and their safety can be guaranteed. The problem is that there is no universal technological standard for flying cars. In the United States, one of the few countries where they are legal, flying cars are defined as "small, light airplanes", so they need to meet the technological standards of both cars and airplanes.

          But since the motors and structures of cars and airplanes are based and built on different principles, and aerodynamic designing is expensive, the cost of flying cars will be very high. So there is little possibility of flying cars becoming popular among consumers.

          Lots of work needed to introduce machines

          Flying car is a good idea but hard to realize
          Zhang Qihuai, a senior lawyer and deputy director of the aviation branch of Beijing Law Society

          In 2015, the US Federal Aviation Administration approved Transition, the world's first flying car, as a "small, light airplane" that legally can be driven as well as flown. This is possible in the US because its laws exercise little control over airspace below 3,000 meters.

          But in China low-altitude airspace governance is still undergoing reforms, and there is no specific regulation on flying cars. So a lot of legislative work is needed before flying cars can be legally operated in China.

          Many questions need to be answered before flying cars can be introduced in China. What kind of driving and flying licenses should the drivers hold? What sort of training they need? Which department should be in charge of them? What kinds of roads can be used by flying cars to take off and land? And should special roads be built or can some of the existing ones be reconstructed for the purpose?

          Also, devices to monitor "road" safety and flight routes of flying cars have to be installed before such machines are introduced in the country.

          More importantly, Chinese laws forbid car owners from modifying their vehicles without official permission. And since flying cars are different from ordinary cars in design, speed and the nature of their engines and accessories, it will be a big challenge for lawmakers to include them in the legal standards for vehicles.

          In one word, a lot of work needs to be done before flying cars can really fly in China.


           

          Most Viewed in 24 Hours
          Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
          License for publishing multimedia online 0108263

          Registration Number: 130349
          FOLLOW US
          主站蜘蛛池模板: 亚洲高清日韩专区精品| 黄色免费在线网址| 精品国产一区二区三区av性色| 九九精品无码专区免费| 亚洲av色香蕉一区二区| 亚洲真人无码永久在线| 国产精品制服丝袜白丝| 深夜国产成人福利在线观看| 狠狠久久亚洲欧美专区| 色狠狠色婷婷丁香五月| 国产一级黄色av影片| 亚洲综合不卡一区二区三区| 国产成人一区二区三区视频免费| 国产三级a三级三级| 日韩人妻无码精品久久久不卡| 亚洲熟妇激情视频99| 午夜国产精品福利一二| 亚洲av午夜精品无码专区| 国产日韩一区二区四季| 影音先锋男人资源站| 亚欧洲乱码视频在线专区| 国产成人亚洲综合A∨在线播放| 国产偷国产偷亚洲综合av| 精品少妇爆乳无码aⅴ区| 91人妻熟妇在线视频| 亚洲 欧洲 自拍 偷拍 首页 | 亚洲精品中文字幕二区| 色伊人久久综合中文字幕| 99在线国内在线视频22| 亚洲 日韩 国产 制服 在线| 日本一道一区二区视频| 最新成免费人久久精品| 国产SM重味一区二区三区 | 国产色爱av资源综合区| gogogo电影在线观看免费| 精品国产中文字幕在线看| 亚洲国产精品区一区二区| 国产乱码一区二区免费| 日本中文字幕不卡在线一区二区| 国产AV福利第一精品| 国产精品污双胞胎在线观看|