Try strafing with the B-25H (it looks a bit like a fighter if you look at it the right way, honest). If you have tracers on, and the guy on the receiving end has a graphically-challenged computer, you can generate some amount of lag on their end. This and large amounts of dust kicked up by bullets can help you make a safe getaway if you're against a Wirblewind. And don't forget to lob a 75mm shell along with the 50cals, just so you can do some real damage.