只能听到旋转翼的阵阵嗡嗡声。当瑞士技术大学(简称ETH)在公众面前展示“飞行机械领域”多旋翼飞行器的最新技术时,人们都屏住呼吸。两个这种类型的小飞行装置在空中相对飞行时,就像较大型号的蜻蜓目一般,飞行装置的上半部分装有一个网,类似于网球球拍被镶入一个圆形的木质框架。其实现在只缺少欢呼的声音。一个助理掷人一个球,左边的飞行器以闪电般的速度下坠,从下方接住球,同时温柔地将球击向它的对手。对手相当优雅 Can only hear the buzzing of the rotating wings. When the Swiss Institute of Technology (ETH) presented the public with the latest technology in multi-rotorcraft “flying machinery”, people held their breath. Two relatively small flying devices of this type fly relative to each other in space, as in the case of larger dragonflies. The upper half of the flying device is equipped with a net similar to a tennis racket set into a circular wooden frame. In fact, there is only lack of cheering voice. An assistant hits a ball, the left aircraft falls at a lightning speed, catches the ball from below and at the same time gently hits the ball to its opponent. The opponent is quite elegant