Just a note Sterrius, I just read this post and I checked the reddit and the game files and its true. In short, the AI does not research new aircraft models among other things because the AI weights for actually doing new model research is very low. Thus all the AI will produce are the 1936 model planes and their variants until the game ends. So your jet fighters will still be fighting planes from the start of the war. However this might also be the cause of some of the air combat discrepancies as if I'm right, 2 1936 fighters can still overwhelm 1 1940 and possibly a 1944 one? Since the AI only produces the old models, their overall production will increase over time so it really boils down to quantity vs quality.
it depends. When you put everything against the Fighter II you can hope to survive.
This guide have kind of MP in focus as well. Because if you can win against a player you can win against the AI easily.
For example. Go germany 1939 scenario and pick germany.
Germany have only fighter I. 1200 fighters and placed everything on the french border.
UK and France have fighter II. They usually send 400-600 planes day and suffered around 20-40% penalty on air coverage.
I did used different combinations of Wing size but the results where more or less the same. I Played 1 month war starting and pausing at the same hour.
I Used wings of 38 , 100, 300, 600 and 1000.
In full defense, with air coverage and all other advantages on my side i was barely holding it with 0.9 Fighters loss to kill 1 Fighter of them. We both lost around 700-1000 planes month depending on my wing size and operation.
High casualities and i would lose the skys for 4 months until i can start putting some Fighter II of my own on the skys.
So even on the best terms a 1936 plane have problems to kill a fighter II and the difference in cost is not that big to make much of a difference.
Maybe on a theater that heavily penalizes the opponent air coverage we could, maybe, win with a 1936 fighter. Mostly maybe with a four to 1 ratio.
I also did a play 36-39 with england and had fighter II. Used 200 Wing size to have 3 wings on the german border. (total 600 planes).
I usually killed around 4 bombers to each fighter. I did upgraded that fighter II with a industry, doctrine etc but the difference was too big to be only that.
About wings.
100 - 300 Worked way better than the others. Most likely because they have enough wings to hold on their on and reinforce if needed. I don´t know the size of the AI wings and that makes it hard to know why both wings performed similar results.
38-600-1000 size wings had Huge problems.
38 wings while they can reinforce they quickly reach the Wing cap and you will face lots of 2v1 against you.
600 size and 1000 size faced the problem they could not engage multiple wings at same time, so they killed a lot less.
Also they got more losses. Most likely because they where being intercepted more times and faced more battles when they return home already damaged without any wing being able to help them out.
So While Big Wing is generally when alone they are actually worse. You need a minimum amount of wings to create multiple battles instead of a big one.
PS: For fun i put all the 120 H. Fighters germany had and did one test making them interception of bombers on night with the fighters only on the day. The number of bombers dead went up a lot and they do really pay for themselves easily. The problem is that the number is too low and of course they where all dead by the end of the month.