Note: This Flight Plans must not be used in real flights, because the plans produced by this App are not accurate, because the earth is not flat but a globe.
With the help of a simulation, I show, up to what altitudes the earth appears flat, although it actually has a spherical shape. Using some animations, you can learn how to recognize the curvature of the earth, or in what circumstances it appears flat. The simulation can also simulate refraction. I prove by means of photos, how the simulation depicts reality, by superimposing the simulation results onto photos.
Deutsche Version: Das Wahre Gesicht der Erde, Kameradistanz spielt eine Rolle
I derive the formulas to compute the distance between two points for both models. The computations can be carried out using a calculation form. An example is then used to decide which model corresponds to reality.
In this article, this effect can be calculated with a calculation form. The calculation is verified by means of a real flight. In addition, all the formulas used are listed and explained.
Deutsche Version: Zentrifugal- und Gravitationsbeschleunigung in einem Flugzeug