这些“害群之马”曾一度使它们的制造者非常尴尬,并令它们的拥有者和飞行员们非常厌恶和恐惧,在某种程度上,这些飞机从来都没有投产,甚至比最具疯狂幻想更加奇异。一些入选的飞机有的是由于在设计上过于幻想化,据现代的航空理论其飞机重量过大或发动机功率不足等,有一些是难以从地面起飞,有的是起飞之后无法降落。 These “black sheep” once made their makers awkward and annoyed and horrified by their owners and pilots, which to a certain extent were never put into operation even more than the most fanciful fantasies Singular. Some of the selected airplanes were designed to be too fanciful in design. According to modern aeronautical theories, their aircraft weight is too heavy or their engine power is insufficient. Some of them are difficult to take off from the ground and some can not land after they take off.