This is a fascinating collection of over 100 patents from US Patent Office which deal with ideas on how to build your own flying saucer. Although all inventors use a classical aerodynamical approach for lifting the vehicles in the air, the collection offers a variety of breakthrough ideas which may also be applied to an electromagnetic propulsion system. So, let's build some flying saucers. A must read for everyone.
置顶卡
变色卡
千斤顶
显身卡
有一天自己也造一个。