Fighter performance; F-4 vs MiG-21; actual plane analysis

[mars]

I may wrong, but as far as I know, North Vietnam Mig-21 pilots rarely engated any dogfight because Mig-21 had fewer weapons than US fighters and there were simply too many US fighters around, their tacitcs were usually "hit and run".
And the US navy "top gun" programs was mostly about to develop correct tactics on high speed jet armed with modern missles, in the early stage of the Vietnam war, Americans still used tacitcs develped in WWII, and that caused many problems