Quote:
Originally Posted by Roblex
Am I misunderstanding something about convergence? I see people saying that they, for example, set the horizontal convergence to 250yds then the vertical convergence to 400yds. My understanding is that this would cause the bullet streams to converge at 250yds while still climbing above the plane of your aircraft so that by the time they drop down to to the same level as the target they are scattered all over the sky and almost certainly either side of the target.
What am I missing? I can see that if you open fire on an enemy from 250yds while in a turn then you wont need to apply as much lead but if you are not in a turn you will need to calculate a vertical offset when it should not be needed so you don't really win overall.
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Lets assume your intended target was a Me109 250 yards in front of you, your gunsight is set for both 250 yards range convergence and the Me109 wingspan so that the 109 fits snugly between the range bars. The pipper, your aim point, is sqarely on the tail/fuselage centre of the 109 and you squeeze the trigger. In your example the .303s would converge in the horizontal plane at 250yds on a vertical line through the 109 centre but would be above the intended 250 yard aim point because you have set them to drop back onto the sight line at 400 yards. And by then they would be nearly as far apart horizontally as their mounting positions in your wings because they are 150 yards further on than the target point.