When relentlessly pursued by a Spitfire, desperate Messerschmitt 109 pilots sometimes used a negative G tactic to escape. They pushed forward on their stick, putting the aircraft into a wild nose-down dive. This, of course, produced a significant negative G force on the aircraft and pilot. If the Spitfire pilot had little experience, and tried to follow, he would also experience negative G effect, but his Spitfire Merlin engine would cough and splutter as the negative G forces would cause the float and all of the fuel in their carburetors to be thrown to the top of their carburetor body and starve the engine temporarily of fuel. The Messerschmitt 109 has fuel injection, and would power away from the Spitfire, giving it very valuable seconds to escape their clutches. I don't know if the game models this, but keep your eyes open for Me109 pilots trying this manoeuvre. Spitfire pilots worked a strategy where they firstly inverted their aircraft, then pulled hard on the stick, making the turn into a positive G manoeuvre.
