Hi WxTech
after your post I tried other planes ... f4f-3, f6f (all versions), corsair (all versions), zero (3 versions) and all of them work fine.
Then I tried to use, as the F4F-4 player plane, not the first one of group of four but the second of the four and in this case everything works ... the first (AI) plane take-off, then I as the player take-off, then the third and fourth (AI) take-off without any problem ...
So I can say that the only problem is with F4F-4 (and FM-2) if the player is the first plane and the AI is the second plane ... but all the campaign (USS ENTERPRISE campaign) is based on the player as captain, so first of the group of four ... I made the first 8 missions with F4F-3 and everything was ok, then with all the missions with the F4F-4 I have that problem ...
Well, it's very strange, never had a problem like that before

One more thing, I love your cockpit mods ... I installed the "WxTech Wildcats cockpit mod for stock Wildcats v3" and it works fine with F4F-3 but, related to my problem, with it installed I was not able to use the F4F-4 plane ... at the start of the mission I cannot go into the cockpit of the player's F4F-4 plane ... I can only see it from outside (with F2) so I cannot give any input to the plane.
But if I remove the F4F-4 folders from your mod (and maintain only the F4F-3 folder, that works like a charm) then I can go into the F4F-F cockpit and use the player's plane, but have the problems that I wrote in the first post of the thread with the second plane of the group of four (so the AI plane) ...
What could be wrong ?