隐身技术Stealthtechnology2PPT学习教案

1、会计学1In the modern war, who has technical superiority, who will win the warStealth technology is one of the most important technologiesStealth fighterStealth warshipStealth tank第1页/共16页第2页/共16页In the early days, in order to improve the survivability of the aircraft, people make the plane fly higher a

2、nd faster，such as :SR-71U-2But with the development of the missile, this idea is out of date第3页/共16页第4页/共16页In 1975 , the first generation of stealth aircraft appearedF-117Its radar-cross-section(RCS) is only 0.01 m Nighthawk(夜鹰）第5页/共16页It also participated in the Kosovo war and the Iraq war第6页/共16页

3、Then the third generation : Then the U.S. Defense Department has developed the second generation of stealth aircraft :B-2F-22F-35第7页/共16页By comparison we can find how to achieve stealthUnique shape1Wave absorbing materials2reduce the heat radiation3第8页/共16页Is it true that the stealth plane will not

4、be found?as long as it is close enough, it will be found by radarPassive radar(无源雷达） can increase the probability of a plane being discoveredNO第9页/共16页On Marth 27th, 1999, during the Kosovo war, with the help of passive radar , South alliance(南联盟） shot down a F-117On May 7th ,1999, The United States bombed the Chinese Embassy with B-2第10页/共16页第11页/共16页FC-31第12页/共16页This is the latest NO.2017 J-20Metal coating（金属镀膜）Prevent radar wave from shining into cockpit(座舱）第13页/共16页Duck wing（鸭翼）F-22not do a good job in reducing the heat radiation第14页/共16页In