Playwood shell hull design

Alexanov, perhaps I expressed myself badly because I agree with what you say.
I say that straight frames can be in a non-developable surface and curved frames can be in developable surfaces. I think that, basically, is the same as what you say.
Also, straight frames can be in developable surfaces. That's what I commented on the dilemma posed by CDokey.
Greetings and peace for all.

 

This is most simple and usefull explanation. Thanks.

 

It looks very interesting article. I will read carefully.
Another issue that interested me is to know approximate methods to develop not developable surfaces, and are easily programmable. Does anyone know anything about it?. Thanks, again.

 

This is not easy. Usually you have to find plates contour with minimal stretching/shrinking deformations. 15 years ago ve develope such alghoritm for ShapeMaker and it takes about 1 year with adjustments and test in different shell areas.
Here I found in internet some Master's Degree -https://fenix.tecnico.ulisboa.pt/downloadFile/395142233596/resumo.pdf
Not sure how is simple this method.

 

Thanks Alexanov, that's part of what I was looking for. In my student days (many years ago) I used the geodesic method, described in your article, and also methods of triangulation and the straight base line. Your article completes the information I needed. I'll see if it can be programmed for use in my applications.

 

Thanks everyone for help. I am finish with this boat and quite happy with result.