Join Date: Feb 2000
Location: Annapolis, Md
Thanked 436 Times in 366 Posts
Rep Power: 10
Re: 110 vs. 135 Headsails
The San Juan 28's were pretty typical IOR race boats of their day. (I actually have one at the dock at my house that belongs to a friend) They were designed to be sailed with 150% genoas and to have a pretty large sail inventory, typically a 150, 130 to 135, 110,and a 90 in addition to spinnakers, and spinnaker staysails. As others noted they were also intended to be sailed with a lot of weight on the rail (probably around 800 to 1000 lbs of crew weight on the rail). Because of the hull design, lack of stability, and rig proportions their sails tend to have a pretty narrow wind speed range. And then you are sailing on the Chesapeake Bay with its predominantly light winds punctuated by short chop and changeable conditions.
Minimally you would want an "A.P." 135% genoa for most conditions. A 135% won't sail well in really light winds, but should come alive around 6-8 knots of breeze. As the breeze builds into the low teens, the first thing would be to reef the main and not change the jib since these boats have a tendency to build a lot of weather helm and wipe out when heeled. If the 135% jib had a foam luff, you probably could furl that down to about a 125% and carry that into the mid-teens and maybe slightly above that. After that a 110% would be a lovely sail. The 110% should be cut pretty flat and have as much luff as possible to give it the widest wind range. It should be a decent sail from somewhere in the low teens to the high teens and maybe a little higher.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay