这些遥控飞行器一般是由步兵用弹射器、弹弓或者用手投掷发射，其数量要比大型无人机多得多。而大型无人机的数量又与有人驾驶飞机的数量相当。
These robots, typically launched by foot soldiers with a catapult, slingshot or hand toss, far outnumber their larger kin, which are the size of piloted aeroplanes.
发射的时候只需要把它的部件扣装在一起，然后往空中投掷即可，会有电动推进器带动其升空。
Launching it is a matter of snapping the parts together and throwing it into the air, whence it is carried aloft by an electric propeller.
一个普通的2d物理引擎。拖，投掷，发射和踢起来。
A simple 2d physics engine. Drag and throw, launch and kick-up.
投石机：古代投掷物体之发射器，用作发射长箭或重型球状物。
Ballista: Ancient missile launcher designed to hurl long arrows or heavy Balls.
投石机：古代投掷物体之发射器，用作发射长箭或重型球状物。
Ballista: Ancient missile launcher designed to hurl long arrows or heavy Balls.
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