Cicumnavigation

[broozee]

I believe that we are in a flat earth but what about travelling around the world in a straight path

[Planearth]

The FAA published a document in 1988 ( The same year Global Hawk remote control was rolled out ) that says the earth is flat and stationary for all purposes.
Then, NASA edited the same document in 2012 adding that until the speed of Mach 3 is reached, the earth is flat & stationary. At Mach 3 it warps into a ball!

www.faa.gov/about/office_org/headquarters_offices/ang/offices/tc/about/campus/faa_host/labs/tgf/media/AircraftDynamicsModel.pdf
www.nasa.gov/centers/dryden/pdf/88104main_H-1391.pdf (pg. 6):

"This report documents the derivation and definition of a linear aircraft model for a rigid aircraft of constant mass flying over a flat, nonrotating earth."