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Old 04-24-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

The changes to the ballast & keel on this thread reminded me of a question I have never found an answer to.

When putting a bulb tip on a keel it seems to be standard practice for the bulb to flare out & down and the bottom to be flat - presenting something of a triangle in section view.

It intuitively seems to me that it would be more effective to reverse that so the keel tip/bulb interface was flat to create a definite, sharply defined end-plate and maximize the foil depth of the keel - presenting an inverted triangle in section view.

The difference in righting moment would be extremely small but it strikes me the flow characteristics would be quite a bit better that way

?????? Anybody???
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