The physic in the landing

[somethingbrite]

Great post related to this topic can be found here.

Physics and Aerodynamic on Directional Stability - Part 2 - Getting to the Root of the Problem

The coefficient by itself doesn’t tell the whole story, as you also need a reference length to go with it. So, it will depend on what that length is. For example, for a yawing or pitching moment, does the sim use the wingspan, semi-span or mean aerodynamic chord as the reference length? That’s part of it. My theory is that they are not calculating 3D lift slopes for tail surfaces. That is, corrected for aspect ratio and sweep. They are using 2D lift data for an airfoil ( I think ). Also, …