Mixture and Engine Pitch..

[KnightFandragon]

What are these settings all about and how do I know what to set at what altitude and stuff? Ive been playing this game for awhile not using any of these Mixtures or Prop pitch settings, just kinda start my engine and go but am now trying to figure out what they are for. I played with prop pitch the other day in a P47 and all it did was make my engine sound weaker. Im sure it does something useful, I just dont know what it is exactly. Then I watched the Carrier take off training and saw one step was to set engine mixture to Rich mixture and was like "huh, whats that about"? Ive been flying the game with those numbers above the enemy's heads off for the last while now and it certainly makes spotting your targets harder but it actually has made my gunnery better b/c I actually focus on aiming instead of watching till the numbers get close enough then shooting haha. Then to boot im tired of being outrun by AI Normal Me109 F2 and F4 pilots while im in my Spit 25 and even my P38 while we are both in level flight and Im sure its b/c they have thier mixtures and stuff set so id like to get them figured out.