The flat earth thing is new to me... and frankly a bit strange...
The Bishop Experiment is interesting evidence, but I can't argue any of the math either way.
I am an admitted round-earther and I can't help but feel that in some respect their disregard for gravity and the affect it has on us and our ability to perceive the world around us, the empirical method they use as justification, is their biggest flaw.
After all, take a rock in a sling. We are the rock, the sling is the earth, and your arm is the rotation of the earth. At slow speeds the rock falls out of the sling. Earth rotates too slow we would fall off. However at a higher speed the rock no longer wants to fall out, it is held in place. (Centrifugal Force) And thus people are held in place and don't fall off the face of the planet. (Gravity)
That is probably HORRIBLE science but it makes sense to me.