近代飞机一般必須在机場的跑道上起飞和降落。拥有許多条跑道的机場,附設有指揮塔台、有綫和無綫电通訊設备,以及雷达和其他导航設备等,是一种复杂和价值昂貴的工程建筑。在战爭时期,机場上集中着大量的飞机,成为敌人攻击的显著目标。由于缺乏机場,有时尽管有很多优良的飞机,也不能使用。为了消除这种困难,近代設計人員力求設計出可以不用机場和能够在小場地上进行起飞和降落的飞机。圖中繪出了一些这样的飞机。 (1) 这是一种利用起飞架起飞的飞机,飞机用起重机裝置在一种特制的傾斜的架子上,依靠飞机 Modern aircraft generally must take off and land on the runway of the airport. Airports with many runways, with control towers, cable and radio communication equipment, as well as radar and other navigation equipment, are complex and expensive engineering buildings. During the war, a large number of aircraft were concentrated at the airport and became a significant target of enemy attacks. Due to the lack of airports, it is sometimes impossible to use them even though there are many excellent aircraft. To eliminate this difficulty, modern designers sought to design aircraft that could take off and land at small sites without the use of airports. Some of these aircraft are pictured here. (1) This is an aircraft that takes off with a take-off frame. The aircraft uses a crane device on a special tilted shelf and relies on the aircraft.