The mould for the flat panels are 16 mm melamine chipboards. These boards are 8 ft by 5 ft in size and I am building half a panel at a time. Catamaran length is 28 ft so 2 pieces of melamine board joined together is enough for half a hull length.
The dimensions of the bottom panels as per the plan are marked onto the melamine board using a water based marker pen.The two small pieces of 3 mm melamine wood strips are added to make the flanges. This makes it easier to join up with other panels later on.The bottom panels of the catamaran does not call for any PVC foam or gelcoat. The layers are 300 gm CSM followed by 3 more layers of 600/225 biaxial mat. These materials are bonded together using polyester resin. I had purchased BQTN resins which does not have a layer of wax and is la ow Low Styrene laminating resin.
It takes me about 3 hours of work to get one panel ready. The panel is then left overnight for it to cure (solidify).
The manufactured panels are easily separated from the mould. I had finished building all the panels for the bottom of the Gypsy. It is a good experience and I will move on to building the panels for the hull which would be more interesting as this is where the PVC foam will be used.