See my other question here for the background context.

Consider this simple plane. I have applied the 4 basic forces: lift, drag, weight, and thrust. My question is, where, precisely, do I apply the lift force?

Forces applied to an airplane

I've read through this which says it's at a quarter of the chord length. But where does that sit in 3 dimensional space? Most airliners have slightly swept wings. The chord length also changes along the wing. How can I model this mathematically?

  • 1
    $\begingroup$ Center of lift changes with angle of attack. It's not that useful for aeronautics or modeling. $\endgroup$ – JZYL Sep 12 '19 at 3:24
  • $\begingroup$ In straight and level flight, the overall center of lift (including lift from the fuselage and elevator) is exactly on top of the center of gravity, otherwise the aircraft would change pitch. This is different from the center of lift for the wings alone. $\endgroup$ – Bianfable Sep 13 '19 at 13:44

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