In response to several questions, Sailing is basic physics. 1. You have the under body, the hull, keel and rudder and 2. you have the Sails, in my case a dacron North main and a funny material 140 Genoa.
Each of these generate forces that have to be balanced to move quickly and efficiently. My winged keel is a NACA low speed symmetric airfoil and it generates lift at a 4 degree angle of attack. The hull carries its beam well aft and the underwater shape varies with heel angle tending to come up into the wind if heeled more than 18 degrees. The rudder balances the underwater forces and shouldn't need much playing after you balance all the forces. Think of your autohelm. I have all the sail controls needed to shape the main and Genoa. All are adjustable from the cockpit. The main sheet traveler is mounted on the bridge deck and is equipped with a Harken Windward Car system. Once the main is properly trimmed with the correct twist, the trimmer doesn't change the foil shape, just its attack angle. The Genoa is adjusted for power. I have adjustable cars to do that and a hydraulic backstay. Hope that answers the questions I've received. I've been real busy cleaning up Michael mess. Allen On Fri, Oct 12, 2018 at 4:23 PM David Miles via CnC-List < cnc-list@cnc-list.com> wrote: > Hi Allen, > Very interesting comments regarding your experience with a C&C MK2. > If you have a moment, let's connect up. Maybe we're related, as we own the > same boat...#115. > mi...@intergate.ca > > David Miles > 1988 C&C MK2 Impulse > > On October 11, 2018 10:45:10 Allen Miles via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Hi Doug, I had Septima for 24 years. She has a winged keel. Sails >> really fast and high if you limit heel to 17-18 degrees and no more than 4 >> degrees rudder. I marked the leather wheel cover to indicate 4 degrees port >> or starboard. Helms person puts approprite mark TDC, tells main trimmer, >> who is playing mainsail lateral position with the Harken windward car on >> traveler mounted on bridge deck, how helm feels. Too light, raise car, too >> heavy, lower car an inch. The keel's foils are very efficient at racing >> speeds. You don't want to stall them out. >> >> Allen Miles >> former Aeronautical Engineer >> >> On Thu, Oct 11, 2018 at 11:11 AM Morgan Ellis via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> Hi Doug, I'm just finishing my second season with my 30-2 and absolutely >>>> love it! Although I don't race mine it would make an excellent race boat >>>> and could be sailed to her rating fairly easily. I do my racing on a >>>> friend's J35, so I don't need to spend the extra for the fancy sails for my >>>> own boat. I have heard of some 30-2's that are raced very successfully on >>>> Lake Ontario. I put on over 600nm each year cruising on Lake Superior and >>>> this boat does it all very well. I've crossed the lake each year heading >>>> down to Bayfield, she handles the big water with ease, but does like to be >>>> reefed fairly early. I'm not sure if I would want the wing keel version? >>>> Being a racer at heart, I do like how she points and it is a relatively >>>> tender boat compared to other C&C's, so I'm just not willing to give up the >>>> performance edge for a few inches of draft. Feel free to contact me at >>>> svmeand...@gmail.com if you want anymore feed back on the 30-2. >>> >>> >>> As it's snowing here today I am going to haul out this afternoon :( >>> >>> Reagrds, >>> >>> Morgan Ellis >>> SV Meandher 30-2 #140 >>> Thunder Bay, ON >>> >>>> >>> >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
