ORIGINAL: Crackaces
I think there is an opportunity to look at the big picture. maybe an IJFB can chime in but given the level of IJ fighter production and losses about how much HI would the IJ typically have saved? Joc should have the world cut off and the IJ should be using the HI reserves at this point? I would assume that the IJ economy is about to have its day of reckoning ?
Judging by the air losses... from what I can see in the screenshot a couple of posts up, adding up all of the IJ planes listed in the second screenshot is a total of 23,818 engines. That's 857,448 HI spent. There are 10891 IJ aircraft unaccounted for. Assuming half of those are 2E (Netties?), 40% 1E (Vals, Rufes, etc.), and 10% 4E flying boats (Obvert has used them a lot, unsure if 110 is a reasonable number for their losses)... That still only totals about 1.5M HI. For 3 years of game time (1098 turns?), that's not TOO much. 1366 HI per day. With Scen 1 pilot training costs, I think Obvert can afford this.
Perhaps part of the problem, Joc, is that you're fighting over his bases a lot with sweeps, so his pilot losses are much lower than they otherwise would be? As for operating outside of air cover, are you playing with the database fixes? They make AAA much deadlier, and if he wants to inflict any kind of real losses on your LCUs from the air it's going to require planes, blood, and supplies that he may not be able to afford. Even IJAAF humble 2E bombing campaigns just burn up the supply. In an AI game not so long ago, I was bombing daily with ~500 IJAAF 2Es, all Helens/Sallys. The supply required numbers at their airbases jumped to a total of ~40k between them. If he wants to expend that amount of supply now (not to mention the HI to replace the planes, and the hard-to-replace pilots), it's going to really hurt him later.
RE: pool levels in general -
You're in the "dead zone" for the P-47 right now, aren't you? I just loaded up a game from the Allied side. The P-47D25 stops being replaced in 6/44, and the P-47N doesn't start until 3/45. I think I remember seeing this pop up in other threads.
You just started receiving the P-51D at 120/mo and the F4U-1D at 158. Maybe it's time to let the USMC pilots take over a bit of the burden?
Also, I agree with Bullwinkle a bit here. You could use other good planes at high altitudes if you weren't restricted to second-best rating. For example, the F4U-1D has a max alt of 39.3, which is still slightly higher than the -84r Frank and it's SR1 vs. the Frank's 3. Likewise, your P-38s are being prevented from doing their historical job as well by that HR - they have max alts near 40k, but their second-best band tops out at 31k. But you're 3 years in, so we can discuss that in a different thread/game

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