CFM, a joint venture between GE and Safran, two engine-makers, has over 1,000 engineers working on Rise, an open rotor-engine that does away with the cowling that covers the fan blades.

CFM 是通用电气和赛峰集团这两家发动机制造商的合资企业，拥有超过 1,000 名工程师致力于 Rise，这是一种开放式转子发动机， 取消了覆盖风扇叶片的整流罩。