Wednesday, August 7, 2013

Hydrofoil sailing - AC 72s - video

This video explains the essence of "foiling", hydro-foiling that is in the AC 72s - the Americas Cup boats.  I have long explained sailboats as an airplane with one wing in the air and one in the water.  But until now the job of the wing in the water has been to prevent sliding to leeward.  Now it is to lift the boat and stop slipping to leeward.  To prevent a nose dive (a head on crash at highway speeds) you must change the fore-aft tilt angle of the dagger boards (the hydro-foils).  The crew needs those helmets and high tech suits with built-in pfd's. - GWC

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