1. Always attack bombers from underneath.
2. The gun or missile that you have the least of is always the most powerful.
3. All prop planes have better turning capability than jets ,if you can avoid getting hit by a jets (slashing attacks) you'll kill them every time as they move away from you.
4. the aim-7 sparrow will only maintain a lock given 2 things: You have to be in range (or you can just send a whole crap load o' missiles over without a lock just to see if they hit and if they do, enjoy watching the destroyed plane nose-dive into the ground). You can't move: if you turn the plane you can't expect the missile to hit.