I don’t agree with you, but I can get where you’re coming from with this. I’m soon to bed, but I’ll try to answer a couple things here so you’re not left with nothing.
20mms are insanely overpowered.
It is better to say that .50 cals are a bit below average in damage. If you know how to use them, and if you set situations up right, they still work well, and there’s things you can do with them that can’t be done with other guns, but the damage isn’t going to be as good as most 20mms, and that’s just how it is to compare an HMG with a cannon. Ultimately, 20mms are generally the standard, with .50 cals a step below that, and 30mms a step above.
This is difficult when one: You’re usually in an inferior plane. A Yak-3 will utterly gank me, A Ki-100 is nightmare fuel, and spitfires make me gag. While I’m in a P-47D or a P-51D. I can’t really do anything. I don’t turn good, I don’t climb good, I don’t even really roll good…
“You need to fire within convergence and hit the fuselage”. Think about that ! Your guns will be WAY WORSE, if you do not fire within that specific range in your convergence and if you go outside you will do PIECEMEAL damage…
Until about a year and a half or so, maybe two years, I was an Fw 190 main. At that point in time, it rolled quite a bit better than US planes, but climbed about the same, turned worse, and had about the same speed; I say this because this makes them relatively comparable for the purposes of this conversation.
Yaks, Spitfires, Japanese planes, and all the other UFOs are always annoying and cancer to deal with. You can deal with them, but one of the perils of shorter games is that planes like the Fw 190 or P-51 that fight with speed are disadvantaged, because with a longer game you’d be able to win almost 100% of the time, but with a short timer you’re forced to take risks you shouldn’t.
That said, having flown the Fw 190 quite a bit, and more recently having been flying P-51s over the last month, it’s definitely doable, just incredibly annoying. I won’t get into the specifics of it now, because it would take too long for my exhaustion to tolerate.
The armament I can discuss more briefly though. In real life, 20mm minengeschoss was objectively, on the balance, the best A2A cannon in ww2, because in real life pilots were usually shooting within 100 meters, which means the poor ballistics didn’t matter. In-game, you tend to shoot around 600-700 meters, or you do a lot of deflection shooting, and in both cases the German rounds are too low velocity and too high drag to be convenient. In addition to this, other cannons do comparable damage while being much easier to handle, resulting in MG 151s being below average in the game.
This does, however, make them fairly balanced compared to .50 cals. While the MG 151s tend to need to be fired within 500 meters or at stalled targets to hit in the first place, .50 cals tend to need to be fired within 500 meters or at stalled targets to do consistently good damage. .50 cals are easier to use, since you can hit longer shots, which gives you an extra option, but if you want to be certain of a kill it has to happen sooner. Having played the P-51s, especially the C-10 (which only has four, not six guns), this is entirely doable, because against a slow target, or one within 500m, it is fairly easy to line your shots up on the engine and canopy, which will kill or cripple the enemy.
To end this, and I may well extrapolate further on BnZ stuff tomorrow, since that’s my bread and butter, I really like both the Fw 190 and P-51. I haven’t played the Antons since the overheating nerf, but before that they were both awesome planes. The case you describe where you have to fly with great precision and not make any mistakes is the reality of a high speed, slow turn plane in this game, and having good guns doesn’t fix that.
The dynamic of it is that, while you can’t afford to make any mistakes, if you do play it perfectly you will not lose. A turnfighter has a much easier game, but even if he does everything right he might still lose. A speed-fighter can’t make any mistakes, but if he does it right, he’ll win 100% of the time (excepting carry situations).