We should test that. I think it would be a fun collaborative venture if we had a few flat earth believers and spherical earth people preform the same experiment and posted our data here(maybe in a new thread or something).
I'm sure we could all agree on a test platform of some kind. Something cheap and easy to build.
Besides the fun of preforming a amateur global experiment it might be a way to move away from the FET vs RET vibe this board has. And like I said.... It'd be kinda fun.