I haven't gone out and done experiments (I have with some actually, back in school we're encouraged to do these things, and when I was a teacher, did some myself with the students) because literally thousands have done them before over millenia, as I said.
Why repeat a tried and tested process? You are attempting to push a radical new narrative that has so far got zero research into it. It's time to change that, no?
RE: 4 responses for flat-earthers; Facts over Fiction