Actual experiments such as this KILL the spinning ball theory .. night after night, Polaris is always there, same place same time, shining with the light of truth that could change everything ?
"After setting about in 2015 to debunk the 'flat earth' claims of a friend, I found it fascinating that I could not."
You didn't try very hard then.
Proof of curvature. Sextant corrections, long distance navigation, spherical trig, the fact that land slowly goes below the horizon when you sail away from it and slowly rises from the horizon when you sail towards it, the fact that you can see further with increasing height, celestial navigation and so on.
Observed proof of rotation. Trade winds, TRS, gyroscopes and gyrocompasses, ocean currents, weather patterns and so on.
"There are numerous experiments anyone can do that proves the Earth is not curved 7.85 inches per mile squared,"
Do you know how to calculate the true bearing of Polaris?
What is the bearing of Polaris from 55˚S, 155˚W?
So you don't know! Which proves your claims are lies.
"night after night, Polaris is always there, same place same time, shining with the light of truth that could change everything ?"
Shining with the light of truth that proves you are dishonest, at best.
"Polaris is always there, same place same time". Anyone who makes that claim is advertising their total ignorance, so well done.
Do you know how to calculate the true bearing of Polaris?
What is the bearing of Polaris from 55˚S, 155˚W?
Game OVER Flat Earth Believers !
Flat basketball
Jeff Lau
UselessPickles
https://imgur.com/gallery/nSGtPtz
asifthinkingmatters
It does, you should try it sometime, but it may destroy your ignorance!
"After setting about in 2015 to debunk the 'flat earth' claims of a friend, I found it fascinating that I could not."
You didn't try very hard then.
Proof of curvature. Sextant corrections, long distance navigation, spherical trig, the fact that land slowly goes below the horizon when you sail away from it and slowly rises from the horizon when you sail towards it, the fact that you can see further with increasing height, celestial navigation and so on.
Observed proof of rotation. Trade winds, TRS, gyroscopes and gyrocompasses, ocean currents, weather patterns and so on.
"There are numerous experiments anyone can do that proves the Earth is not curved 7.85 inches per mile squared,"
Correct, because that is not…