The light-medium will be a 155%. I considered going larger but was unable to work out the trade offs. With PHRF Lake Ontario there is not much of a penalty, they switched to 1 sec/mile increments on adjustments a couple of years ago. I would see -1 FS and -2 NFS.
Even with -1 sec/mile I was unsure if I wanted to carry that for what might be an advantage below 5 kts TWS mainly. The heavy-medium does well in light air once we get going, better than I expected. I am guessing that it holds its shape well in light air being a molded sail, and at some wind speeds the shape is as important as the sail area. If the sail cannot settle or trim into a nice airfoil then all you get is more drag with a larger sail. Lake Ontario has been good for testing, hours of fluttery shifty light winds on long races. Once we stall out it is a whole process to start moving again, and steering too much just makes it worse. Michael Brown Windburn C&C 30-1 Date: Wed, 3 May 2017 16:53:05 +0000 (UTC) From: "Ronald B. Frerker" <rbfrer...@yahoo.com> When you get the light-medium will you be going to a 160% full hoist given the heavy is 151%?RonWild CheriC&C 30-1STL Cc: Michael Brown <m...@tkg.ca> Sent: Wednesday, May 3, 2017 6:10 AM Subject: Re: Stus-List Sail advice for 35 Even with a sail larger than 105 the sheeting angle may make a difference. There isn't much online about racing sail design for an older C&C 30 so some of it is guesswork and some experimenting. I wanted a sail that would cover a wide wind range, possible now with the strength of materials like 3Di. The long term plan is to have a light-medium #1 and a heavy-medium #1. I started with the heavy-medium that ended up as about a 151.4% but with 10" short on hoist. Even going down to a 145% at full hoist affected sheeting angle and draft placement. The range was to be 6 - 19 kts, works well to 21 at which time we reef the main. Acceleration is slow below 6 kts but that was the compromise. I have 3 x #3s with different draft running to a short track on deck inside the shrouds. At least on the 30 anything further inboard started interfering with the main, and the lazy sheet works well as an in haul for small adjustments. I have a kevlar #2 which doesn't see much use. It is the usual design, a 140% with a flatter cut. The flatness tends to reduce the power below 18 kts, and above 22 at 140% it is getting too big. I also suspect the sheeting angle isn't optimal. As a result I tend to go from the heavy #1 to a #3 unless the wind is pretty steady at 20 kts. The fastest we go upwind is with an 85% headsail, 22 - 24 kts and flat water. Still a full main. The 85% has a deep draft forward, points to about 35 AWA, and I have seen 6.7 kts on GPS. Michael Brown Windburn C&C 30-1
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