Christian CG #103 took care of the construction of the mould. We ordered from a model builder a 3D printed positive form of the keel bulb in styrofoam. Christian has doubled it up by 3cm to create enough space for the shrinkage during the casting process. The styrofoam model was covered with 2 layers of epoxy to get a smooth surface. Christian built a box with the external dimensions H 24 cm, W 40 cm, L 105 cm. He cemented the bulb model with steel reinforcements. Small bubbles and bumps in the cement surface cannot be avoided. Thus the negative mould was smoothed with a thin plaster layer and sanding. The cemented form has to dry in the shed for a few weeks so that it loses moisture. Christian built 2 moulds because we had no experience whether the mould break and in addition to speed up the casting process.
Many thanks Christian CG #103! Awesome job!
Hi
I have been watching at your blog and can tell you that is probably from all variuos others one’s the better I found !!! congratulations on doing such an excelent work in writing so precise and informative informations and congrats for your built ( many sklls involved )
One question ; once the first pour done on a mold did the plaster fairing have been damaged for the second pour ? or it remained perfect because I noticed that using this solution you have an more than excellent exteranal skin result for the 4 castings comparativly to others builders leaving the cement as it was
Thanks for any information !!
Where are you actually as a progress ???
Bon courage mon ami