Bending plywood an old trick ive used in building radio control scale model boats is to soak the plywood in an ammonia water solution. The easiest way to bend plywood at home is using clamps and a form made out of medium density fiberboard or by using a ratchet strap.
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The ammonia will allow you to bend and clamp the ply around a fixture or mandrel.
How to bend plywood for a boat. In the interest of time and money ive decided to use marine plywood to plank my lapstrake dingy. Bent plywood can be used to give furniture and cabinetry a sleek seamless appearance. And the plywood needed to build her will be relatively thin and flexible.
Because its made from a series of cross laminated sheets though plywood is more difficult to bend than raw wood. It is really a matter of getting a sheet of plywood on the boat and testing the bend. Instead of laminating veneers or using a product like bendy ply i tried laminating thin furniture grade plywood to make thicker plywood.
Building your own plywood stitch and glue boat is a low cost and light weight alternative to spending 10000 on an expensive commercially built boat that is difficult to trailer very heavy and guzzles. Youd have to soak it for a few hours in your bath tub with ammonia added to the water. It will mean a little trimming but hey im building a boat not simply putting one together so shouldnt be a problem.
In many cases the plywood will have sufficient flex to be able to bend it cold around your hull shape. How to bend plywood. Cc chair how to bend plywood.
I think you will find that the plywood once cut to size will easily flex enough to bend cold around your shape. So now i am thinking i may need to steam bend the marine plywood plank so. My results were quite succ.
However if it wont at first pull all the way into the shape that you need dont force it. After a while you will find that it will have relaxed into that bend. The species of wood makes a difference as well.
Its the amount of area in combination with the bend that is making this difficult and a better grade of plywood of course the aft deck is much narrower and takes the bend well. How to build a plywood boat. As i think about it we used 38 okoume on the sockeye at the stern.
For a stronger sturdier bend you may want to glue multiple pieces of. Bend it as far as you can clamp it then leave it for a few hours. Ive just cut out a pattern for the garboard and when trying to bend it around the station closest to the bow the point of maximum bend the outside layer of the cheap 14 plywood i was using for the pattern cracked.
Once it dries it holds the form. We used bs 1088 hydrotec they call it meranti on the rest of the boat and i dont know if it would have worked in 14. Mike hi greg most designs for a dinghy of that size will have relatively gentle curves.
I had a few weeks to build a chair and decided to experiment with bending plywood. The ability to bend plywood opens up a number of interesting design possibilities for amateur craftspeople as well as professionals in a number of trades such as boat building.
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