Let's take the flight times example again. On a round Earth, the distance from Buenos Aires, Argentina from Wellington, New Zealand is about 6,208 miles. On a flat Earth, the distance is about 15,374 miles (more than twice as far as on the round Earth model). If you don't trust that figure, feel free to check the distances for yourself: Round Earth Distance Calculator and Flat Earth Map.
Using Google Maps, I was able to find a flight from Buenos Aires to Wellington that takes 18 hours and 5 minutes (with two stops). This means that the average speed of the airplane on a round Earth is above 343 miles per hour (since some of the time will be spent on the ground, the airplane will have to move above this speed in order to account for the lost time). Modern airliners are easily capable of meeting and exceeding this speed, but fall short of the speed of sound. On a flat Earth, however, the required speed of the aircraft is in excess of 850 miles per hour. This is supersonic (the speed of sound at altitude is around 670 miles per hour).
The only airliners capable of meeting this speed were Concorde and the Tu-144, both of which are retired. This cannot be written of as "oh, a 747 can do 850 mph, they just keep that a secret", as the design of the airplane itself prevents this from being the case. The engines are non-afterburning, high-bypass turbofans which cannot produce the needed exhaust velocities to achieve this speed. The laws of physics prevent the aircraft from matching the required flat Earth flight time. Unless, of course, you want to argue that the people who perform experiments on aerodynamics and people who design airplanes are also in on the conspiracy. At this rate, it seems like there are more people involved in the conspiracy than not involved. Not to mention the fact that sonic booms produced would be detectable..
Using Google Maps, I was able to find a flight from Buenos Aires to Wellington that takes 18 hours and 5 minutes (with two stops). This means that the average speed of the airplane on a round Earth is above 343 miles per hour (since some of the time will be spent on the ground, the airplane will have to move above this speed in order to account for the lost time). Modern airliners are easily capable of meeting and exceeding this speed, but fall short of the speed of sound. On a flat Earth, however, the required speed of the aircraft is in excess of 850 miles per hour. This is supersonic (the speed of sound at altitude is around 670 miles per hour).
The only airliners capable of meeting this speed were Concorde and the Tu-144, both of which are retired. This cannot be written of as "oh, a 747 can do 850 mph, they just keep that a secret", as the design of the airplane itself prevents this from being the case. The engines are non-afterburning, high-bypass turbofans which cannot produce the needed exhaust velocities to achieve this speed. The laws of physics prevent the aircraft from matching the required flat Earth flight time. Unless, of course, you want to argue that the people who perform experiments on aerodynamics and people who design airplanes are also in on the conspiracy. At this rate, it seems like there are more people involved in the conspiracy than not involved. Not to mention the fact that sonic booms produced would be detectable..
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