Mesaje

design gaff catter 22 http://www.amariner.net/sailing_yacht_design_bit22.html

Of course, the better plywood the better would be boat.
Ballast weights are for:
- centerboard (compromise - low draft falsekeel (lead filled)+centerplate) = 465 kg. VCG=0.62m from BaseLine
- liftkeel with lead bulb (+trunk) = 380 kg. VCG = 0.58m from BaseLine
- finkeel (bulbed lead filled) =650 kg. VCG = 0.38m from BL
The displacement difference depend on mass of ballast and engine (inboard installed/outboard)
All data are for full loaded boats
I calculate STIX coefficient and it is 28.8 for boat with CG=0.6m from Baseline, so boat falls into the category B (14-32), and if the CG is lower, then STIX would be better.

thank you
The Tempro-25's headroom is 1.65m. I used ФСФ plywood, which is available in the  former Soviet Union regions and it is cheap enough. It is an exterior grade plywood with enough water resistance. Hull is GRP covered of course(two layer 200-250gr/m2 glass cloth).
 

Please discuss this boat

New handmade boat on water http://www.amariner.net/samostroy_tempro.htm