(let's try to not sidetrack it this time with meaningless posts and get ourselves locked)
A wonderful opportunity for you Flat-Earth people! Starting November 24th, Qantas will be making direct flights from Sydney to Buenos Aires. This is a chance for you to prove once and for all that Earth is flat (or not).
Note the following things, which will be different depending on whether Earth is flat or round.
1. The flight time. The difference in distances is vast, depending on which Earth model is correct.
2. The flight path. If Earth is flat, I believe (looking at a Flat-Earth map) you'll fly over North America, parts of the Caribbean, and the northern part of South America. If you don't, then Earth is probably round.
3. The direction the plane flies in. Take a compass with you! If you head north out of Sydney, then the direction appears to be south later in the flight, you can be sure Earth is flat. If somewhat the opposite occurs, Earth is round.
4. Note the relative position of the Sun to the plane during your flight. It will be very different depending on which model is correct.
Answers to your inevitable objections:
1. "We don't have the money for that." Surely any organisation protecting such an important secret as yours could scrape together a mere few thousand dollars or so for somebody to take this flight. It would be made back many times over with book sales after you prove you're right. Call it an investment.
2. "Jet streams can speed up the plane, some flights arrive in less than half the time because of wind (which will come from Tom)". Uh-huh...would have to be a pretty strong wind, over 600mph, to cut the time of a flight in half. Vector physics, anybody? I don't care what your guy who claims to be a pilot says. No commercial long-distance pilot could possibly do his job competently, if he believes in a flat Earth. He wouldn't even know which direction to point the plane in.
3. "The onus is on you to prove it." Nope. It's on you because you're the one proposing the theory which is not widely accepted. Ours has been proven beyond reasonable doubt for several centuries, and the entire world is set-up on its basis. You have the extraordinary claim, not us. "The entire world is against us and all governments are conspiring" is an extremely extraordinary claim. Besides, I wouldn't get any book sales from a proof of Earth being round. Almost everybody knows that.
4. "Why don't you do it?!" Because you wouldn't believe anything I said. You'd accuse me of being part of the conspiracy with NASA (FYI: I did once work on a project for NASA, in which I observed the curvature of Earth from a camera that I personally mounted on a rocket. I suppose you think the lens was altered). On other threads, you've demanded flight logs, etc. as proof, but we all know that you think any photos, video, documents are faked. You people have even claimed that the windows on SpaceShip One were special windows that make Earth look curved! It's one of the foundations of your theory, everything is faked, everyone is lying... yet you continue to ask people for document or photographic proof. YOU HAVE TO DO IT! Otherwise, you won't ever believe it. This is an extremely important point. YOU MUST DO IT YOURSELVES!
5. "Compasses don't work on a flight." I've never tried, but I'm sure they'd work. Either way, there are other things on the list above and it is not exhaustive. Surely a super-intelligent organisation like yourselves can come up with more ways to prove a flat Earth during the flight. You might even find a way to prove your bending light theory.
Any of you have the guts? What amazing fame, riches and glory you could achieve by proving that you're right! Surely it would compensate you for the few thousand dollars that you spent on the flight and a compass.
Just to be clear, I don't think any of you would actually do it. You entire lives are validated by the fact that you think you have this great secret. What would happen if you were to stop believing in it? You'll probably just challenge me to do it or to bring you proof, probably claiming you don't have the money. I'm just interested in watching what excuses you come up with for not doing the experiment. How creative are you? Ta!