why the spit turns most effectively at the limit edge and the 109 doesnt

[Kurfürst]

Originally Posted by palker4

Spit has a negatively twisted wing that means that angle of attack will be always lower on the wingtip + wingtip probably uses different airfoil than root with different lift characteristic so that it will never stall first. That means spit can have eliptical wing without dangerous stall characteristics.

That's simply called washout and is found on the vast majority of WW2 fighters. There's nothing magic or uncommon in it.

Elliptic planform theoretically means even lift distribution. Even lift distribution means the whole wing stalls all at once. With a twisted wing you no longer have an even lift distribution, no reduced induced drag, and no dangerous stall charateristics.

Simply to put from the aerodynamic POV, it's not an elliptic wing.