>>331634Sundials depend on a curvature on the sun's trayectory through the sky respective to the earth's surface, which can be caused by either a tilt on the surface or the sun's movement. It doesn't prove anything.
The periscope and lighthouse have limits in both the flat Earth scenario and round Earth scenario. Meaningless.
High gear gyroscopes do actually begin to tilt if left alone. Those are the ones airplanes use. Like the example with the tilt of constellations and such before, the tilt is rather slow due to the scale of the earth in relation to its spin speed.
Stop being a nigger