Re: Which naca profiles for sailingboats
Ed, I think you're totally exaggerating. I haven't sailed with a sloop-rigged Tirrik any time I can remember, but I've sailed in company with all sorts of sloop-rigged boats and I don't get particularly outpointed by any that aren't something like an Etchells or a Melges. 10 degrees is huge! And I don't just always sail in lapstrake character rowboats either, I ride the trapeze on a 505 or drive an eight-ton 36' yawl on occasion too, so I'm not just a single rig partisan. Rowan's got a high peaked and pretty high aspect lug foresail, and she points awfully good for a rowboat. I credit the foil for much of that.
Originally Posted by keyhavenpotterer
I choose the lug rig for a sail and oar boat for a great many reasons--particularly handling and handiness--but that doesn't mean I don't enjoy wringing all the performance I can out of this boat. I am never content with low-performing boats of any shape or sort, be they paddled or rowed or sailed. Since tank testing has proven that a properly shaped foil will provide better performance than a flat plate, I think it's very much worthwhile to add it into the mix of all the other compromises and choices you have to make when chasing down an optimax solution for my own particular variety of boating.
I don't expect anyone to take my claims on faith or purely as an academic thought experiment. Rowan and I will be at Howard Rice's Small Boat show in Port Townsend on May 19 and again at the PT Wooden Boat Festival In September for any of you relatively local guys who would like an easy opportunity to check her out.
Last edited by James McMullen; 04-11-2012 at 03:16 PM.
Amphibious Macroplankton Oughtredia doublendus
Mostly found frequenting the littoral and estuarine zones in the southern half of the Salish Sea, though sightings have been recorded both north and south of this area, and occasionally, but rarely, inland, in freshwater environments. This species lives on micro-brewed beer and dutch-oven biscuits,and displays brightly colored nylon and gore-tex plumage during the rainy season. Approach with caution!