How to shell the hull of a patch based boat?

[lichtzeichenanlage]

In the past I've used the shell command mostly on simple designs and it work like expected. This time I try to shell the hull of a boat developed in the patch environment it I'm not able to hull the boat.

I'm getting a partial result, if I split the body and hull the boat from the (new) front side. But this is not what I want. On the one hand I have to hull the complete boat and in an idle world I want to hull it from the deck downwards.

I tried to use the thicken command and it worked on a simplifed verson of the hull, but only to the outside, wich messes up my dimensions.

Thanks in advance for any help.

Wilko

[designingberlin]

I ran into similar problem on complex designs.

One workaround is to offset the surfaces and create a cutout volume with a 'boundary fill' command.

This doesn't work for you since it's impossible to offset the surfaces in your model.

The next level workaround is to mimic the step be step construction from the outer shell with offset sketches - this means manually building the inner shell surface and this might be boring.

I hope there is another consistent solution.

Best,

Stefan

[lichtzeichenanlage]

@designingberlin: Mhh... Not exactly what I was looking for, but I'll give it a try. 

[TrippyLighting]

Fusion 360 is rather picky as it pertains to surface curvature.

For example, if you do need to use 2 or more lofts for the first side wall of the boat, at the very least, where 2 splines interface they should have a tangential(G1) , or even a smooth (G2) constraint.

Then your patches should also have a smooth constraint to get decent surface curvature across the entire loft.

I posted this solution to a similar problem just the other day. Hopefully It can provide a few helpful hints.

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@TrippyLighting I checked your video and I try to apply your techniques to my project unless it sounds more reasonable than modeling an inner and an outer hull separately. Thx for your effort and providing such good tips.