What am I doing wrong with the spitfire ?

[RE77ACTION]

One more thing about the trim of your aircraft. If you don't like to trim your aircraft constantly, you don't have to. The only thing you have to accept then it that it doesn't fly completely neutral all the time. I myself like to trim my aircraft when flying the first straight after take-off. After that I make only minor adjustments during the mission.

If you fly this game with a joystick (which is recommendable), I suggest you change the key bindings when it comes to trimming. I personally use the up and down arrow for elevator, left and right for ailerons and delete and page down for rudder. This make trimming a lot easier compared to the default key bindings.