Pm first featured a concept of the roadable airplane in 1942 , calling the idea " 10 years ahead of it time " and speculating that post-world war two transportation would rely on the concept .
He says the transition roadable aircraft easily changes to a car .
他说,汽车过渡的可行道路飞机很容易改变。
In the past , roadable plane designs have been most limited by the challenge of merging two technologies into one craft .
在过去,陆空两用车辆的设计最大挑战是把两种技术融合进一架飞机。
It 's been aptly dubbed the transition , a " roadable aircraft " designed to shift from road to air and back again seamlessly-it was also selected as one of our 50 best inventions of 2010 .