Usually, you can see a small circle as indicator when you shoot a plane.
Fire at this indicator means you shoot the fuselage, if you make a little deviation, you can shoot the other part of the plane. Fire at the vulnerable part and you can shoot it down swiftly.
Attention: As noted on some of our social outlets, War Wings will be removed from stores as of the beginning of December. So, please refrain from performing further in-game purchases as your enjoyment of said purchases may be short-lived.