The 1/4 Ton
I = 31.2 P = 27 Disp = 4050 Lbs PHRF = 222
J = 10 E = 7.8 Draft = 4.1 ft
Sail boat design was a product of rating formulas and rules. In the late 60's early 70's the International Offshore Rule (IOR) was developed as a by product of the Cruising Club of America (CCA) rule for racer/cruisers. They developed level classes where all boats could compete without the usual PHRF handicaps. It was back to the best boat winning by finishing first. There were 1/4 ton, 1/2 ton, one ton, etc for classes.
Sailboat designers utilized variables for length, length of the water line, beam, sailarea, mast height, boom length, displacement............ to try to increase drive, reduce wetted friction and maximise hull speed..
1/4 ton class home page
Out of the Blue 1/4 Ton home page
Examples of other 1/4 ton boats are the Ranger 23 and Ron Hollands EYGTHENE.
Interior forward port side of the S25
Interior aft port side of the S25
There are a few S25 still out there. Mike Roth has found Hull # 105 Built Sept 74, > Model S25 Mk I.
It takes a lot of time and effort to clean up and restore the older boats that have been at the mercy of time and the elements. Here are a few photos that Mike sent in of his find and project:
More information received from Carles Kyler. This S25 site is only here because of contributions from S25 owners.
Schock documented the trim for racing conditions in a 6 page summary. It would be an excellent place to start to evaluate you boats characteristics. Local conditions may influence sail trim and selection.