Forgive me, but why it is valued so much to be THAT far underweight. All I can think if is that you've made a design error. Because those 5 kg of lead you'll have to hang of the platform will do a whole lot less for performance and feel of the boat then including those kg's in extra platform stiffness, stiffer beams, impact resistance, stiffer daggerboards, stiffer rudder setup, reinforced keel line or even heavier and cheaper components in the way of blocks and lines.
I never understood why some sailor pay top dollar to get special lightweight lines and blocks only to add a few kg of lead before racing.
Wouter
Because, Wouter, if you build the boat as light as possible, with everything as strong as it needs to be for the use that it is likely to get, any weight saved can be added as correctors in the middle of the boat. This way it is kept out of the ends and where it will have least adverse influence on performance.
If you decide to put in extra beefy main beam trays, or reinforced the bows, the CG of the boat would move forward of the ideal position and weight in the ends is an undesirable. Build light and trim the boat as you wish.
When we built our T back in 1982, it came out around 8Kgs under. As the maximum allowable correctors were something like 5Kgs, we put extra-heavy re-inforced centreplates in her and at measurement we had to carry 4.5Kg of lead under the main beam (right under the mast). That was a lovely T in a seaway, compared to other Ts, as she pitched very little.
