Hello,
I would add another thing which as far as I know is not explained (sorry if I am wrong, but I am new here, I have read the FAQ and I didn't find an answer):
if a plane flies starting from north pole in the south direction (in the Flat Earth map this means: following a ray of the disk), what happens when it reachs the boundary of the disk??
In the round earth it would eventually come back to the starting point...what in the flat earth?
thanks!!