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(shí)環(huán)翼機(jī)像火箭一樣筆直上升，降落前一直處于巡航模式。
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(jī)沒(méi)有尾翼，而是采用一個(gè)延伸的圓形作為外部引擎，幫助飛機(jī)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