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.RonWild CheriC&C 30-1STL

-----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
Aries1990 C&C 34+New London, CT

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