In order to successfully evade a SAM, fly directly at it at full speed. If you feel the engagement is not good, then break off. However, do not break off until you have tried at least once. If it works, you will pass over it and any missile fired will miss you. When you pass over the SAM, hit the brakes, turn sharply, and head at it again, but this time fire. Pass the SAM at about 100 feet.