I agree. Lift must go to zero at the tips. The rest of your explanation is beyond my understanding but I agree lift must go to zero at the tips, certainly 1 millimeter beyond for sure.....I will keep saying it. Lift unavoidably MUST go to zero at the tips.
I just followed the formula in the attached document. It appears that in all iterations of this formula the Cla line will be at 0.5 at the tips, to include the example in the document. I won't attempt to explain what this means or what Cla means or represents. I just "followed the instructions" or at least I think I did.
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