As long as jet planes have been around, modelers have been developing ways to model them. The easy way is to put a prop in the nose or on the tail, and ignore the spinning prop while flying the plane, but modelers want more authenticity than that. In the '50s, CO_2 cartridges were too heavy and Jetex rocket motors weren't too reliable. The first ducted fans with their stamped and twisted aluminum fans on OK Cub .049s didn't produce much thrust, so the air-frames had to be stick-and-tissue to be light enough to fly.
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机译：只要喷气式飞机一直存在，建模者就一直在开发对它们进行建模的方法。一种简单的方法是将道具放在鼻子或尾巴上，而在飞行飞机时忽略旋转的道具，但是建模者想要的是真实性。在上世纪50年代，CO_2弹药太重，而Jetex火箭发动机并不十分可靠。 OK Cub .049s上的第一台风管风扇带有冲压和扭曲铝制风扇，不会产生太大的推力，因此机身必须采用粘纸和薄纸组织，以使其轻到能够飞行。
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