This two-seater , the tyrannos ( pictured below ) , has ducted propellers powered by petrol engines , with a battery backup .

这种双座飞机-暴龙（如下图）配备有由汽油机驱动的导流螺旋桨，同时还有一块备用电池。

In testing the jetpack could travel at 60 miles per hour for up to 30 miles and as high as 7 800 feet using a gas engine and two ducted fans .

在测试中，喷气设备可以60英里每小时的速度飞行30英里，通过一个气体引擎和两个管道风扇，可以上升到7800英尺的高度。

This second system consists of four ducted fans , one mounted at each corner of talaris 's carbon-fibre frame .

该次系统包括4个与带输送管的风扇，分别安装在“塔拉里斯”碳纤维外壳的4个角上。

He is currently installing a new computerised control system on his hoverbike , an aircraft which is ridden like a motorbike but has ducted fans at the front and back instead of wheels .

现在他正在他的飞行车上安装全新的全电脑化的控制系统，这种飞行器驾驶起来像摩托车但是在车辆前后而不是车轮上安装有导流风扇。