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,国空军继续投资于航空喷气研究所(原西洋研究所)可变喷流管火箭发动机系统,将其作为增程空空导弹未推进选项。