I have to agree with Lusche, your "gaming the game" by turning your engine/tracks sounds off.
On one hand, there are those who like to try to keep things as realistic as they can even tho this is a game. As an example, stick stiring. Realistically you couldn't do it because the G forces would kill you, cripple your plane, or both. Some frown on it.
On the other hand there are others who use what ever trick they can to avoid getting shot down, or get an edge to win.