new 30 ft tug design(which material?)

Gents,
if you can design your hull devellopable , for a one off, you can also consider molding plates on a flat mold (plywood+ formica) , massive fiberglass,adjust and decrease thickness on the bended area, and do a simple wooden gig for the assembly, finish with monolytic lamination from inside, frames molded on foam , you get a nice finish, and bulletproof hull.
chine can be rounded on small mold built on the gig if needed. we do many fishing boat this way, efficient , quick and good looking .
cost for polyester resin and fiber remain really reasonable..& no rust! also nothing heavy to carry during building...
all the best, fun project !
Bertho
www.fusionschooner.blogspot.com

 

Bertho do you have more info on this?
just to clarify- if you cast sheets on a Formica table - you can then plank the hull as if it is a piece of ply? you could mold the radius chine to the required radius? could this work in a strip plank style? then faired with putty?
Just to clarify- make a table- lay up thick sheets of glass(1/2 inch thick) then cut the sheets into strips? they could be joined with an epoxy putty as in wood strip?. Then faired with epoxy putty as you would in scored core...??

hmm has this been done?

 

do a jig, like a female mold with cheap wood, one frame every 2 ft for example, little wooden batten to check fairing and support molded fiber
panels, if you want round chine , you can do like strip planking only on the chine , with packing tape as finish, inside this jig , you make the templates for your panels, side , bottom.. you report the template on the table and mold only the exact panel, can be more thick in the middle, just few layer around (like a scarf shape) ready for stitch panel together.
on the chine , if rounded, stop the template just before the curved area, you will laminate the chine together with adjacent panels
when cured, you install the panel inside the jig, using few screw to keep in place before laminate all panel together.(can cut the screw from inside and laminate on the top, easy to remove from outside anyway..
finish full lamination inside + frame and bulkhead , remove the jig, very little fairing outside if you have carefully install your panels. .
we do same process also with sandwich panels, only one side vacuum molded with the foam, the panel remain flexible, all internal lamination also under vacuum done after panels connections.