It should work on the 109 and i guess on the 110 too, maybe for a couple of the bombers as well but it's not yet.
For the rest of the aircraft, the control logic that applies is that "if it wasn't present in the real aircraft, pressing the keys in the sim does nothing". In other words, you can't set prop pitch in the Tiger Moth even if you mapped your controls correctly, because it only has a fixed pitch propeller. This is the way everything else works as far as controls go, from flaps and gear extension mechanisms to wheel brake systems.
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