Sorry no, simple physics has numerous tests to verify a rounded earth quite nicely.
Fascinating. Like what?
Easiest one? Stick a pole in the ground on a date when it leave no shadow at noon. Then stick a pole in the ground 500 miles away. Measure the shadow left by that pole on that date.
The rest is easy math. And, well, hiring camel drivers to pace out the 500 miles, but it worked for Eratosthenes.
Plus you can see different constellations in the sky depending on your latitude, longitude, and the time.
Plus you can actually see satellites overhead at night. With a low powered telescope, you can actually - y'know, *SEE* them.
Plus the field artillery has to take into account the curvature of the earths surface in order to hit it's targets.
Plus you can actually measure the curvature of the earth when measuring peak to peak heights on mountains.
Plus the distance of the horizon would be determined only by atmospheric density in a flat earth - and the horizon would always seem to be at exactly eye level no matter what your altitude - see level or mountain top (Do the thought experiment on this one).
Plus if you went 'around the world' on a flat earth you would neither lose nor gain a day.
Also, by extension, Jet Lag would be an impossibility.
Atomic Clocks on a flat earth would *not* show any difference in time measurement because of altitude - but do.
CD