Those are some excellent quotes from some great sources the Australian, British, and US Antarctic surveys have many additional fantastic resources to choose from as well. Journal of Geophysical research is a fantastic journal, that supports Open Access publication, so the full texts of lots of peer-reviewed articles available for free download. Awesome stuff!
Iceman,
At this point this topic has been discussed hundreds and hundreds of times. It was my very first post here. so much so that I can just copy and paste this for you from a dozen other times that i've put this data. Each time there is another answer. There is a list of dozens of possible answers to your question.
The idea that known flight times, flight paths, and flight distances weaken the various different FE models is something that has been discussed dozens, if not hundreds of times. Here is a large array of responses:
https://forum.tfes.org/index.php?topic=16219.msg217416#msg217416Sometimes flight paths support one FE model and sometimes they support another FE model or even the RE model when flying from point A to point B
https://www.theflatearthsociety.org/forum/index.php?topic=74707.msg2046469#msg2046469 "This flight has never been existed."
https://www.theflatearthsociety.org/forum/index.php?topic=74707.msg2044714#msg2044714"Don't trust aircraft companies such as Qantas and Latam by their claims about flight times. These are liars."
https://www.theflatearthsociety.org/forum/index.php?topic=74707.msg2045126#msg2045126"If you find a video show full flight of a travel between Chile and Australia, then there will be a possiblity that path it exist."
-These flights only exist if you can produce a full video of the entire flight.
https://www.theflatearthsociety.org/forum/index.php?topic=74707.msg2045413#msg2045413-flying from Santiago, Chile to Sydney Australia in about 14 hours is impossible
https://forum.tfes.org/index.php?topic=6633.msg121615#msg121615-Because the angles of a triangle drawn between three flight paths = 180 degrees the earth is flat.
-Because the angles of a triangle drawn between three flight paths = 179.99984 degrees the earth is slightly concave.
https://forum.tfes.org/index.php?topic=6633.msg121996#msg121996-Distances between two cities which are far apart is unknown
https://forum.tfes.org/index.php?topic=6633.msg122030#msg122030https://forum.tfes.org/index.php?topic=6633.msg122441#msg122441-Flight GPS systems are inaccurate
https://forum.tfes.org/index.php?topic=6633.msg122359#msg122359-GPS systems are based on a round earth therefore will give measurements/distances which support a round earth.
-Aircraft are using instruments which assume round earth coordinates which will support a round earth.
-There is no flat earth map.
-The difference in flight time is based off of flight speed which has yet to be proven.
-The airplane speed and range is based off round systems therefore will give speeds and ranges which support a round earth
https://forum.tfes.org/index.php?topic=6633.msg122364#msg122364-plane speed measurements are unreliable
https://forum.tfes.org/index.php?topic=6633.msg122369#msg122369-there are no flat earth flight programs, systems, GPS etc because the flat earth aircraft navigation fund is nonexistent.
https://forum.tfes.org/index.php?topic=6633.msg122410#msg122410-Triangulation as a measurement of distance can be inaccurate because the "known" locations used for triangulation are based on a round earth system
https://forum.tfes.org/index.php?topic=6633.msg122411#msg122411-there are almost an infinite number of continental configurations (If a flight disproves flat earth continental configuration 23985729387592873 you then need to test continental configuration 23985729387592874).
-Groundspeed measurement instruments use a round earth coordinate system therefore will give results which support a round earth
https://forum.tfes.org/index.php?topic=6633.msg122423#msg122423-proof is needed that mile measurements on a highway are accurate
https://forum.tfes.org/index.php?topic=6633.msg122433#msg122433-Google maps is based on a round earth coordinate system
https://forum.tfes.org/index.php?topic=6633.msg122655#msg122655-any navigation system based on longitude and latitude is a round earth navigation system (which is most likely used in all navigation systems)
https://forum.tfes.org/index.php?topic=6633.msg122664#msg122664-any map, navigation, or measurement system which uses Latitude and Longitude in any way is inaccurate
https://forum.tfes.org/index.php?topic=6633.msg122672#msg122672-That's not the map of the earth (a variant of there is no map of the earth)