Hannu's Portuguese Dinghy Done Salt Bay Style

[Charlie43]

The 2024 Family Boat Build was a raging success. Thanks to the efforts and persistence of the families, eight more Salt Bay Skiffs are now part of the wooden boat world. Also contributing to the success of the event is the simplicity of the jigless building method that RiversWest uses. (No building frame. Just assemble the parts.)

Hannu's 7'6", Portuguese Dinghy shares a lot of the look of a Salt Bay Skiff. (See photos below or at his website.) Hannu drew it to be built Stitch and Glue, and I've done one that way. But the more forgiving path for a first-time boat builder would be Salt Bay-style using an external chine instead of an epoxy-filleted one. So, that becomes the project for this 4th of July week, confirm Hannu's Table of Offsets, then loft the boat and make construction drawings.







https://hvartial.kapsi.fi/

[Charlie43]

This is an overview of the boat's lines.



This is the cutting pattern from Hannu's website.




This is the plank pattern. Notice that the cuts are straight line cuts, the same as the Salt Bay.



But this is how a marine CAD program translates his table of offsets. Notice how ragged the lines for the upper and lower edges of the plank are.



Clearly, there are errors in the offsets that need to be fixed before the boat can be lofted.

Accurate offsets enables an accurate lofting, which enables accurate construction drawings, which means little grief in the assembly process, because all the problems have been foreseen and solved on paper instead of dealing with them as they arise on the building frame.