15 NASA Documents that Prove Flat & Non-Rotating Earth.
01-page 12:
"aircraft flying in a stationary atmosphere over flat nonrotating earth"
https://www.nasa.gov/centers/dryden/pdf/88072main_H-1259.pdf02-page 108:
"aircraft flying over flat, nonrotating earth"
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19890005752.pdf03-page 124:
"The nonlinear equations of motion used are six-degree-of-freedom equations sith stationary atmosphere and flat, nonrotating earth assumptions."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19890007066.pdf04-page 2:
"The method is limited, however, to application where a flat, nonrotating earth may be assumed. "
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19720012071.pdf05-page 11:
"The nonlinear equations of motion used in this model are general six-degree-of-freedom equations representing the flight dynamics of a rigid aircraft flying in a stationary atmosphere over a flat nonrotating earth"
https://www.nasa.gov/centers/dryden/pdf/88248main_H-1777.pdf06-page 14:
"Lastly, the equations of motion for the zeroth-order problem of flight in a vacuum over a flat Earth are presented."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19940020279.pdf07-page 2:
"In this paper, the rigid body equations of motion over a flat non-rotating earth "
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/20070030307.pdf08-page 6:
"The earth is flat and non-rotating."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19790005472.pdf09-page 17:
"The helicopter equations of motion are given in body axes with rerpect to
a flat, nonrotating Earth."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19810003557.pdf10-page 10:
"A model frequently used is that of a flat, nonrotating earth."https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19650015408.pdf
11-page 11:
"These equations assume a rigid vehicle and a flat, nonrotating Earth."
https://www.nasa.gov/centers/dryden/pdf/88733main_H-2465.pdf12-page 5:
"For aircraft problems, the state and measurement models together
represent the kinematics of a rigid body for describing motion over a flat, nonrotating Earth"
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19880014378.pdf13-page 12:
"A flat, nonrotating earth"
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/19710018599.pdf14-page 2:
"In our minimum time-to-climb problem, the aircraft is modeled as a point mass and the flight trajectory is strictly confined in a vertical plane on a non-rotating, flat earth."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/20060053337.pdf15-page 7:
"the missile position in space is computed relative to a flat nonrotating earth."
https://ntrs.nasa.gov/…/…/casi.ntrs.nasa.gov/20040008097.pdfNASA is not a legitimate source, you've said so yourself.