There are almost a million and a half posts on this forum. We've discussed this in the past many times. Why don't you do a search?
I did. This is what I found: You, Mr Bishop, failing to mount any objection to the argument other than to claim the measurements never took place. Jroa and Pongo stating "there are complex maths which explain that it works on a flat earth" but when asked, refusing to clue us in to what those maths are.
And several other threads where Guv and others attempt to get FE'ers to address this and nobody responds.
It sounds like you found your answer then. There are complex maths involved, but it is above your head, and so it would be a waste of time to try and explain it to you.
If they actually understood it themselves, they should go ahead and explain it. Even if person who asked the question doesn't understand it, others might. It also gets you on record as having something to back up your position. The downside, of course, is if your solution is wrong, it is now subject to analysis and its flaws publicly exposed.
"I know the answer, but I can't be bothered to show it to the likes of
you" is the very lame refuge of someone who either doesn't really have the answer, or thinks he does, but has no confidence it can withstand scrutiny.