미해군은 생존성 향상을 위해 항속거리와 속도를 중시하고, 스텔스는 크게 중요하게 여기지 않는답니다.
항속거리는 항모의 생존성 향상을 위해 중요하고(항모가 중국해안에서 멀리 떨어져야 생존성이 올라감), 속도는 전투기 자체의 생존성 향상을 위해 중요하기 때문입니다.
스텔스는 곧 깨질것으로 예측하는 것이고요.
http://www.defensenews.com/articles/speed-and-range-could-be-key-for-navys-next-fighter-jet
Speed and range could be key for Navy's next fighter jet
By: Valerie Insinna, July 21, 2017 (Photo Credit: Boeing)
One key attribute that NGAD will likely incorporate is a longer range — something Brophy says is a significant limitation for the current carrier air wing.
“I tend to think of it not only as range, but as reach. Not only how far my airplane flies, but how far do my weapons go on top of that,” he said. “Reach also gets into propulsion, and when we look at propulsion, I’m looking for efficiency. The longer I can fly without having to go get gas, the better.”
Another critical capability is a throwback to the F-14 Tomcat-era of flight operations: the need for high speed.
Brophy said the Navy, which has historically been more skeptical of stealth than the Air Force, will likely incorporate some low observable capabilities into its future NGAD capability. But it is still undetermined as to whether it becomes as high of a priority as it was for the F-35 joint strike fighter.