Re: Sail for the MC 16.5

Posted by CLC on Aug 9, 2005

Hey, that's neat, Kirk. And a good fit as the Mill Creek 16.5 was directly inspired by the Klepper double.

>>>>>>>>>>> Also on this windy day, I noticed that the leeboard made a line of bubbles under water. Was this some sort of cavitation?


Probably the leeboard was stalling. Air was being drawn down the leeward side of the board and exiting in a vortex off the tip of the board. It'll happen on any surface-piercing foil that's being driven through the water at a high angle of attack.

Solutions include raking the board aft a bit to create a lower-aspect foil. Keeping boatspeed up as much as possible (by not trying to point too high, among other things) will also help to keep the flow attached the leeboard.

In Response to: Sail for the MC 16.5 by KirkE on Aug 9, 2005