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Old 15th June 2011, 01:05 PM   #6
Join Date: Jan 2009
Location: Northern California
Posts: 185

Originally Posted by Farlo View Post
Simple logic would say that you need a certain amount of lift to resist the sideways force of a given sail whichever the board width.
The way I see it a wider board creates more drag. So using a given sail the wider board will need more lift to overcome its greater drag so it needs bigger fin.

However, I think BelSkorpio has a neater way of saying it if not as simple.

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