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exiled said..
How can a wing have more glide but less lift? Does that just mean it needs more speed to get going?
Thinner,flatter profile sections.
And yes,the challenge is getting glide without too much loss in low speed handling and performance.
Thinner foils will usually require higher speeds overall and be more sensitive to AOA changes.So when lifting off they will stall earlier and more abruptly if you increase the angle too much for example.
But there are dozens of factors in designing a foil that can compensate this. Area,Span,Width,Thickness,Camber,Sweep,Dihedral,Taper,Flex...
Add tubercles,steps,fences,winglets etc. and it becomes quite mind boggling.
Infinite combinations to find the happiest compromise.
A lot of knowledge is already there from aviation,previous foiling craft etc.. so our surf and wing foils have started out quite refined but i think designers still have a lot of room to optimize for what we do.