The downwind polars on the J109 I race on regularly definitely assume spinnaker use. The Class jib is barely more than 100% (maybe 105%) and if going downwind jib and main only we’d never finish! The polars we steer to give precise wind angles depending on true wind speed. The lighter the wind, the hotter angle we have to sail. Doubt it is any different with a symmetrical kite.
-- Jonathan Indigo C&C 35III SOUTHPORT CT > On Jun 30, 2018, at 08:24, Edd Schillay via CnC-List <cnc-list@cnc-list.com> > wrote: > > David, > > I’m pretty sure polars are for standard jib and main configuration and do not > account for wing-on-wing pole use or spinnaker use. > > All the best, > > Edd > > ----------------------------------- > Edd M. Schillay > Captain of the Starship Enterprise > C&C 37+ | Sail No: NCC-1701-B > City Island, New York > www.StarshipSailing.com > ----------------------------------- > 914.774.9767 | Mobile > ----------------------------------- > Sent via iPhone X > iPhone. iTypos. iApologize > > > On Jun 30, 2018, at 7:47 AM, David Knecht via CnC-List > <cnc-list@cnc-list.com> wrote: > > The polars for my boat predict an optimal downwind speed at an angle around > 145° true. Does anyone know what assumptions are made in this prediction > about spinnakers and whisker poles? I race non-spinnaker and often on > windward-leeward courses so we are often dead downwind and the whisker pole > makes a huge difference going downwind wing on wing. I am wondering if the > polars take this into account. Dave > > Aries > 1990 C&C 34+ > New London, CT > > > > _______________________________________________ > > 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 >
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