Cannon Choice
Keep in mind when choosing which cannon you want. The larger cannon packs more punch but you cant hold as many shells. The smaller one, while not doing as much damage, is near double the ammo capacity. This works esp well with some of the challenge missions (sinking uboats) and the mission on the Eastern Front..with all the tanks. Try using it in dogfights too...takes out fighters and bombers with ease.
Easier Dogfight
When playing the earlier planes, esp. against the Japenese, you will find yourself getting shot at from behind an awful lot. An easy way to avoid this is to suddenly cut back your throttle to almost stall, make your plane pitch forward and then quickly change your throttle to wide open. When you do that make your plane point to the sky. The persuing plane will shoot by you, making you the hunter. This will not work with the 262 and Komets, as they have a better turn radius than most of the slower planes.
Various Codes
On the screen with New Game/Continue, enter these cheats quickly:
