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*Belt track*
## DECK FITTING
*Window – machined 3mm tainted Acrylic glass to fit opening in a single piece*
*windows fixed (epoxy)*
*Tango deck prepared – 3mm balsa sheet assembled*
*Deck step with hatch*
*Deck curve*
Openscad designed hatch
📎 [hatch](https://guillaumeplayground.net/wp-content/uploads/2021/01/hatch.zip)
📎 [openings](https://guillaumeplayground.net/wp-content/uploads/2021/01/openings.zip)
*3d printed hatch – curved*
*Prepared – with placeholder strings.I added a white window frame in hope to enhance the light effect through the tainted acrylic.*
*Strings are guided by carbon tube sections ended with fishing ceramic ring*
One more G4 primer everywhere to seal wood – light sanding…
*Final opened Tango… ready for deck gluing*
Finally it is clear the hatch position is a bit backward… it was mandatory to access the electronic properly… and let enough space for the keel box. I kept the proportion somewhat correct.
The windows are going to look normal (smaller) with the planking covering.
*Tango deck fixed – slow epoxy with microballoon and waterproofed with epoxy putty*
## BULB
I prepared a new generic openSCAD module to generate bulb based on a naca (or any) profile.
Code is available here: full code package [Github](https://github.com/guillaumef/naca-parametric-bulb) and presentation on [Thingiverse](https://www.thingiverse.com/thing:4747204).
And more airfoils on my [Github airfoil database](https://github.com/guillaumef/openscad-airfoil).
Based on different pictures and profiles informations, I selected the profile naca 66-012 and applied a flatten ellipse section.
Naca 66-012 provides a low drag in straight and level movement.
My STL files: [P1](https://github.com/guillaumef/naca-parametric-bulb/blob/main/examples/bulb-naca-66-012-fellipse-beaver-p1.stl) , [P2](https://github.com/guillaumef/naca-parametric-bulb/blob/main/examples/bulb-naca-66-012-fellipse-beaver-p2.stl)
It happened to look a lot like the original.
*Bulb with the beaver tail*
*3d printed and sanded*
*3d printed and sanded*
*Lead bulb*
*keel & bulb (landing at 2Kg for the bulb)*
## HULL PAINT
Always a long, time consuming and painful process to get a good result.
One wet sanding 600, one paint layer to check surface, one sanding 400 + one wet 800… and two paint layers.
*pur mat carbon black first – after first layer*
*First varnish layer*
*Like the original:Hull: gloss finish (need polishing)rudder, keel, bulb, mast/boom: mat finish*
## DECK PLANKING
*4x1mm tilia wood, separated by 150g/m2 black paper.The paper was previously fixed with a single pass G4 and cut in 2mm strips.The glue is transparent high strength polyurethane.*
*To get a hole-free fixation, pressure is maintained with blue tape.The paper excess is cut after for a glimpse of result…*
*Some details, black paper trimmed a bit. Unfinished*
## SAILS
Sail making with Claudio gadget.
Icarex / Ripstop 48gr/m2.
8% chord.
*Turnbuckle for sail vertical tension*
*Some quick 3d design/print – rings holding the sail to the mast*
📎 [attach.scad file](https://guillaumeplayground.net/wp-content/uploads/2021/05/attach.zip)
## SHIP LAUNCHING
Nice speed. Well balanced. The perfect morning.
I had a great time with my friends at Jardin du Luxembourg in Paris.
Eating the waterline a bit with the 2kg bulb like anticipated. The 1.6kg bulb should be perfect as designed…. but I can not afford to increase the keel size where I am sailing.
The mast is still far from water even with a high angle of list, the next move will be to lower the boom a bit.
