I guess my real question is whether the boat is faster dead downwind with the whisker pole or tacking downwind at the polar angle optimum. I have always used the whisker pole and the shorter distance, and have not yet tried the other route. Has anyone tested this themselves? Dave
> On Jun 30, 2018, at 12:17 PM, Ronald B. Frerker via CnC-List > <[email protected]> wrote: > > Polars presume a spinnaker at the crossover point where the chute is faster > than jib & main. > As for downwind speed, the Marchaj (sp?) book has data to back the old theory > that if you reverse your best beat upwind, you will be going the same speed > downwind. > When the wind speed increases to the point of reefing or smaller jibs, all > bets are off on that theory. Then wing & wing will often be faster. > Ron > Wild Cheri > C&C 30-1 > STL > > > -----Original Message----- > From: David Knecht via CnC-List <[email protected]> > To: CnC CnC discussion list <[email protected]> > Cc: David Knecht <[email protected]> > Sent: Sat, Jun 30, 2018 7:48 am > Subject: Stus-List downwind polars > > 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 > > <pastedGraphic.tiff> > > _______________________________________________ > > 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 > <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 > <https://www.paypal.me/stumurray> > > <pastedGraphic.tiff>_______________________________________________ > > 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 > <https://www.paypal.me/stumurray> Dr. David Knecht Professor of Molecular and Cell Biology University of Connecticut 91 N. Eagleville Rd. Storrs, CT 06269-3125
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