Boyd was guided in his work by one simple principle: he wanted to give pilots a fighter that would outmaneuver any enemy. He did not become fixated on technology or “one-point” numerical solutions. For instance, he did not say the F-X had to have a certain top speed or a certain turning capability. He knew that it must have a high thrust-to-weight ratio if it were to have neck-snapping acceleration. And he knew it had to have lots of wing in order to maneuver quickly into the firing envelope. It had to have the energy to disengage, go for separation, then come back into the fight with an
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