ORIGINAL: Ian R
Finally, for ease of reference (also from the Elf):
... TRACOM was originally designed for the IJ player because historically the norm was that the Allies were in fact swimming in well trained replacements. So much so that by 1943 they realized they had a surplus and began trimming back the fat. If you [ALLIED PLAYER] are not using the feature then that is to be expected. Hardcoded replacement rates SHOULD suffice.
Hope that helps (as long as it didn't change somewhere down the track).
Back when The Elf wrote that, players were IJ playing the game with little knowledge of how to maximize the industry. Now, with Player-Defined Upgrades ON, the IJ player can produce sophisticated aircraft far earlier than historic, and run a very good training program for the pilots. This increases Allied losses and pilots in some service branches and national pools can become very scarce.








