[quote=ziper1221]I got 2000 lbs, assuming that all of the sail force is transmitted to the board, and finding that force using a pressure chart and the known sail area. That seems rather dubious to me. The rudder has a more direct calculation: just take the maximum Cl of the foil section and plug it into the lift formula along with maximum speed.
I redid the force on the board using a right moment method, as detailed in this file [url]https://docs.google.com/file/d/0B3Zekt2OTzO4VHp0dk5PckhtOFE/edit?pli=1[/url] and got 1000lbs, instead. Nice short basic read on design, but no mention of construction (as usual)
ps i know nothing<!-- editby --><em>Edited by ziper1221 on Nov 15, 2019 - 09:05 PM.</em><!-- end editby --> [/quote]
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