coleopter

基本解釋

During takeoff, the coleopter would rise straight up like a rocket before alighting itself for cruise mode.
起飛時環(huán)翼機像火箭一樣筆直上陞，降落前一直処於巡航模式。
Instead of using wings, the coleopter employed a circular extension serving as the outer part of the jet engine while helping the aircraft achieve level flight, as well as vertical ascent and landing.
環(huán)翼機沒有尾翼，而是採用一個延伸的圓形作爲外部引擎，幫助飛機完成水平飛行和垂直起飛降落。

an aircraft that has an annular wing with the fuselage and engine on the centre line