(Sorry - first posted this as reply to wrong posting). Keel lift is a horizontal, not vertical force. Keels are hydrodynamic foils - when they are moved through water they cause both lift and drag forces to develop. Lift is the positive lateralforce that allows a boat to move to windward - drag is the negative, resisting force. A good sailboat keel design has a high lift-to-drag ratio. Wing keels were developed by the Australians to win the 1983 America's Cup (first U.S. loss) by getting around the keel depth rules. When the boat heels, the wings increase the draft of the keel creating additional lift. This being said, I'm sure the angle at which the wing cuts into the water does have an effect but that is not what is meant by keel lift. The America's Cup left NY in 1983 never to return but this May there will be some preliminary cup races in NY Harbor with boats that truly do lift out of the water. Jerry
-----Original Message----- From: Lorne Serpa via CnC-List <cnc-list@cnc-list.com> To: cnc-list <cnc-list@cnc-list.com> Cc: Lorne Serpa <lorne.se...@gmail.com> Sent: Sat, Apr 30, 2016 2:47 pm Subject: Stus-List Wing Keel Lift? So, working on buying my 1st sailboat greater than 15'. It's a 1988 30MkII. It has a wing keel. I read somewhere that a wing keel generates some lift. So.... Does a wing keel create lift? Should I have more heavy stuff at the back of the boat for increased angle of attack on the keel? Or.. don't be silly.. its a 8,000lb boat going 5 knots. It does nothing. Lorne _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
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