麦道公司领导的JAST研究组已选定“缩小尾翼”的设计,这种设计采用了可提高飞机性能(特别是在通常的偏离飞行范围)的主发动机喷管推力矢量技术。麦道/罗斯诺普·格鲁门/英国宇航公司研究组对主发动机喷管推力矢量技术是乐观的,他们认为这项技术很成熟,完全可用到JAST飞机上。据麦道公司的工程技术人员说,推力矢量将提高飞机的效能、使用灵活性和生存力。麦道公司的所有JAST方案 The JAST team, led by McDonnell Douglas, has selected a “tail-less” design that incorporates the main engine nozzle thrust vectoring technology that increases aircraft performance, especially over the normal range of flight. The McDonnell Douglas / Rosenab Grumman / Aerospace Research Group is optimistic about the main engine nozzle thrust vectoring technology, which they consider the technology to be very mature and fully usable on JAST aircraft. According to McDonnell Douglas engineers and technicians, thrust vectoring will increase aircraft performance, use flexibility and survivability. All JAST solutions from McDonnell Douglas