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Feb15
2023
Posted by deleteme

I wonder if any of you may be interested in my 7.5 m foiling trailer sailer project. I know strictly speaking it is not a sport boat but it does have twin trapezes!! And headroom for short people! And I could use some help sourcing a 150-175 kg keel bulb and a 9.5 m carbon mast.

7.5 m long plus 350 mm boarding platform 2.5 m wide, draft 2.0  headroom 1.75m sleeps 4 nominally light displacement 850 kg sailing 1100 with 2 crew 115 kg !!!  2 Invert T hydrofoils with 35% flaps and 2 t rudders with variable AoA like a moth or maybe like an A class.  Sail area main 20 m2 jib 13.2 m2  Fro and kite to be determined.

Construction is 6 and 9 mm ply over stringers with 100 gm carbon biaxial inside and 300 gm carbon biaxial outside with 100 gm glass cloth on the outside. Plywood 1.5 to 4 mm with high-density styrofoam 60 psi and carbon for the bulkheads and berth tops and sides. galley and loo similar construction .cabin top is carbon styrofoam 60 psi carbon with   Foam replaced with shear webs and uni carbon caps.I only wish  Julian B had started his 89er sooner and I would have reduced a lot of my laminates and used more Basalt and pet foam. However, I got the carbon really cheaply. Currently weighs 520 kg with all interior in place and most of the fairing done.

I have been working on this for 2.3 yrs so this is slow going for me after building the NZ tris Dragon and Timber Wolf much faster . Guess I am getting old, but it is taking longer than building Free Radical  10.5 m cat .

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