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Old Jul 15, 2010, 01:28 PM
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Hey,

I know that flat undersides work a bit better, however till now I have found that the shape of the underside doesn't change the performance a lot.

But, the idea of using a symmetrical profile, was to test if the pitching problems, encountered on WIGs, can be solved by using these profiles.

And, as we have found in the other thread, flat profiles and maybe even the thicker symmetrical ones, do improve the handling a lot(just not the performance)

So, the curved symmetrical profile without a flat bottom actually had its reason, but as RDsG, Derk and me have found in the General Ekranoplan Topic, it is possible to build stable WIG models with curved profiles as well, and you're right, they do perform better

Marijn
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