Yeah, I'm late. In fact I rarely participate in these types of threads at all, but I was intrigued when you said a spherical earth has problems.
But while I'm here, let me ask you. Why not go up in a private plane and fly in one direction until you end up back where you started? Wouldn't that prove it to you once and for all (unless you're in the conspiracy too ;-)?
I am really sorry Dysert, but that is one of the most basic questions that people ask when they have no idea about the FE model.
So, here are some spoilers..
According to the FE model.. (which I am still not totally sold on)
You can circumnavigate the FE model in a plane or a boat.
The FE model is like a round plate. North is in the center and what they say is a continent "Antarctica"(the south) is actually an ice rim around the edge of the plate.
You cannot see the curvature from a commercial airliner ( They used to say that you could see it at 35,000 feet but,since so many people are checking it now... they say 65,000 feet)
Ships do not go over the horizon. You can bring them back into plain view with a good set of binoculars or a telescope.
You cannot fall off the edge as there is an ice wall around the edge of the circular flat earth model and the edge is beyond that in extreme cold and perilous conditions... research Admiral Byrd's "Operation Deep Freeze" and "Operation High Jump".
The sun and moon orbit above the FE model and continually spiral in.. for summer in the Northern regions and spiral outward for winter in the North. So, seasons and such are covered.
Gravity is not needed.. well the "theoretical" gravity that is supposedly a property of all massive objects. There is just down.. and density, buoyancy and such control which falls floats or flies.
The sun and moon are much much closer and smaller...
If Coriolis effect is a factor in objects that are moving in one direction through the air... like a bullet... then it must also affect an aircraft.. which it does not.