Nevertheless, even given eventual development of an affordable, safe, fly/drive, airport-independent personal transportation system, there would still be a need to re-invent long-haul transport, especially for transoceanic flights. The current machines of this genre are direct descendants of the Boeing 707, and, after many decades of evolutionary improvement, this design approach simply lacks the scope to address the many problems that must be solved.
amp#160;amp#160;amp#160; 但是，即使最终会发展负担得起的、安全、飞行及驾驶、独立于机场的个人交通系统，人们依旧需要翻新长途交通，特别是跨越大洋的飞行航线。目前这种用途的机器是波音707直接改造过来的，而且，经过几十年演变提高，这一设计方式根本缺乏解决必须加以解决的众多问题的范围。