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Old 03-07-2019, 08:24 PM   #7
Nomad Willy
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City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 16,080
There’s more drag from the connecting part of the blade tips. And interference drag similar to what bi-planes experience.

But tip losses are reduced to some degree and that’sa plus.

May be best for small dia props like small outboards.

May be beneficial and may not. I’d guess not if not betting the whole farm.
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