Extracted from a russian air combat manual of 1945, this diagram of how ot engage a Ju87 or a Me110 is invaluable.
Basically, diving to pull up under the enemy displaced by about 15 degrees and aim ahead of the aircraft. This places you in the enemies blind arcs and out of the arc of fire of the rear machine gun. It also allows you to hit the engine and not the rear armour.
Edited by Tow Air Marshal