Ive read somewhere that Rudel tried to "stalk" his prey by coming in at low altudes, followed by a small climb to reduce speed, and then a fairly shallow dive at about 40 degrees in the final run. Neither the Ju87-G or the HS129 were fitted with dive brakes (Ill stand corrected on that), so Rudel would open fire at relatively shallow angles....about 40 degrees. That contrasts to the steep dive angles used by RAN FB11s, which were often about 60 degrees or more. I think that has a lot to do with the different weapon types. Sea Furies would be relying mostly on their rockets and bombs.....here speed of the aircraft would actually assist in accuracy (shorter flight time) and the steeper the angle, the less margin for error. For the gun armed a/c the slower the approach, the more controllable the a/c, the more likley the fire would be able to hit a weak spot. The engine grating was small protection for the T-34, and the aiming point at least for Sea Furies during Korea. I dont know how successful that might be....controlling an aircraft so as to aim for a particular point on the tank would seem very difficult to me.