Buidling With a Jig

[squid kid]

When building a hull on a jig, how do you determine how to cut the plywood to properly form to the jig?

[Landlubber]

It is called "flat sheet development", either do a boatbuilding course or look it up on the Goohle search, fairly easy to work it out once you understand the principles mate.

[lazeyjack]

Originally Posted by squid kid

When building a hull on a jig, how do you determine how to cut the plywood to properly form to the jig?

presumably you have templates for your jig
set it up ACCURATELY lay a scribing board on the bottom, this can be a sheet say 10 inches wide , clamp it to the jig, then take measures off it, ,using a straight edge across it and marking the distances on the board
another WAY is to buy a hot glue gun and rip up some thin ply into say 3 inch wide, and use these things glued together to make a full size pattern

[Landlubber]

Hey squid, what shape is this boat, is it a chine design or rounded bilges, makes all the difference as to how you go about the project.

What lazy is doing is actually building from a base line (up), he describes using thin ply wood, this is certainly one of the quickest ways to lay planks if you have no idea, but you have to describe the design for any more real info.

[squid kid]

Carolina hull

[Landlubber]

OK, I looked up Carolina Hull, it has a lot of flair. no way you can bend a sheet of ply into that shape, so you are coing to have to laminate the bow section at least. This can be done in many ways, but traditional tripple diagonal layers in thin ply strips will achieve this for you fairly easily. What you are doing is actually recreating plywood, just building it up in place with thin strips stapled and glued over the lower layers, usually at 90 degree increments.