Join Date: Dec 2004
Location: Alameda, San Francisco Bay
Thanked 60 Times in 59 Posts
Rep Power: 12
I have a masthead rigged boat and encounter the same problem with my 130 Genoa. Even rolling it up to a “postage stamp” will not eliminate the harmonics – way too much fabric rolled around the headstay. You just have to pull out a little postage stamp and crank on max backstay tension then grin and bear it. My local San Francisco conditions might be similar to yours. In our summer winds (20-30kts), we swap down to a 110 jib. I had my sail maker cut in a full roach supported by vertical battens which gives me pretty good performance. Downwind, we usually rely on the kite for extra power.