To jump in on this, there are a few questions that came up from reading the wiki page on EA.
The article states that the equation provided for curvature only works when y (vertical distance of Ray's path) is much greater than x ( horizontal distance of Ray's path). If the sun is 3000 km up, how is this equation valid at sunset/sunrise, when the sun is at a horizontal distance of >6,000 km based on the models of night and day depicted on FE maps?
The other question relates to the inclusion of the Bishop constant, which relates to the magnitude of acceleration of a horizontal light ray induced by dark energy. How exactly does dark energy fit within a flat earth worldview when it was only discovered recently, though astronomical investigations, which are dismissed as pseudoscience in various articles within the wiki, and by the words of numerous FE proponents in various fora on this site.