In addition, the USAF continues to fund development work of the Aerojet (formerly Atlantic Research) Variable Flow Ducted Rocket ramjet system as a future propulsion option for an extended range AAM.
此外,美继续投资于航喷气研究所(原来的大西研究所)的可变喷流管火箭发动机系统,将增程导弹的未来推进选项。