johnsmachines

In the 2 layer method of model ship planking the purpose of the first layer is to create the final shape of the exterior of the hull, and to provide a base for attaching the very thin (0.5mm) final layer planks. The shape was initially determined in the model by the shapes of the bulkheads and keel, and refined as far as possible by judicious sanding, but as the planking progresses small depressions and bumps become more obvious and can be corrected to some degree.

As mentioned previously, I chose Huon pine for the first layer of planking, because the the thin strips (5mm x1.5mm) can be bent and twisted into fairly sharp bends without snapping. It is beautiful fine grained timber, and it is a shame that it will be finally covered by copper or paint or a second thin layer of darker planks such as walnut or jarrah.

Each plank covers 5mm. It is glued to each bulkhead and edge glued to its neighbour. I manage about 1 plank per hour, so what you see is about 18 hours effort. If I see obvious hollows or bumps I fill or sand as I go. The plank filler is “Multifill”. It dries quickly and sands well.

The severest bends are at the stern and the bow. So far I have needed only 2 “stealers”, the wedge shaped filler pieces, but more may be required as the planking progresses. The 3D printed clamps are working very well. The stern post will be attached when the planking is finished.

Each clamp requires a 1.5mm hole drilled into the bulkhead. It is filled with glue when the next plank is attached. The hole is angled and positioned so the plank is held flat against the bulkhead, and with as much length for the screw in the bulkhead as possible. Each plank has its opposite installed immediately after so the twisting force on the hull is balanced.

At the bow I have started to taper the planks so they sit flatter against the bulkheads. The lowermost 2 planks are tapered for about 100mm.

I am reasonably satisfied with how the planking is going. No major problems so far.