Being neither an expert on artillery nor planetary motion, I can give a mere layperson’s explanation of an aspect of artillery laying which would seem to negate claims of a flat-disk earth. I don’t support that claim but would be interested to hear feedback in case I have the totally wrong end of the stick.
If you are firing long-range artillery at a target to your north, you can’t aim straight at it; you have to aim slightly to target’s right because the earth is rotating under you as your shell flies through the air. The is I believe an aspect of the coriolis effect. The deflection factor for coriolis is to be increased ... Read even more