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 .
