I think you need more research on this one Eric. A good read is Alan Vaitses book "covering Wooden Boats with fiberglass" written in the early 80's by a boatyard owner. He pioneered wood boat covering with polyester fiberglass...He went against Owens Corning ,broke the rules and had many large and small yachts, fishboats , and workboats. His philosophy was that done right (mechanically fastened in the "green" stage, these FG coverings were as strong as the wood underneath. Way stronger than the epoxy folks treatments, dom
ne his way. As for adding weight, yes it did..but added usually more buoancy because it displaced water due to thickness. Ballast added in some cases. Interesting read that contradicts popular opinion . Whether you agree or disagree, read the book and see many examples of nice boats that have had there life extended for reasonable amounts of money. A Very good read. He is kind of like George Buehler, contrarian. RIP George.
The boatyard where I haul out, has glassed or epoxied a number of Chesapeake Bay work boats and at least one of the skipjacks. Any poor condition boards are replaced. The hull is allowed to dry out for several months and then it's sandblasted to remove any coatings and ruff up the surface. The covering of choice is 2 layers of bi-axial cloth with West system epoxy. It is amazing how stiff if makes an old wood boat. Most of the watermen like the feel and handling of a wood boat. The reduced maintenance of a glass bottom is hard to beat.
Ted
Thanks Jack,
Yup there’s lots of opinions on FG over wood and mine is just one opinion.
On plywood boats FG sheathing can be very effective and good for rocky beach landings or river work.
But for general purpose boats FG covering is all negative ....... IMO. Especially planked boats. Wood expands and contracts. FG basically dosn’t. The sheer forces causes failed adhesion. Wood boats “work” too so the breakdown just keeps getting worse. But with the right kind of wood, the right width of planks and the right surface prep a good FG sheathed wood boat possibly be made.
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This is a wooden Chesapeake head boat now with C-Flex sheathing. Has been converted to a private yacht, now owned by a friend of mine. I have been through the interior of the wooden hull, dry, sound condition, near perfect. Driven by a pair of Detroit 6-71N’s. Nice economic cruising at 8 knots on a 70’ Boat.
C-Flex fibreglass planking has been developed to make it possible to build a fibreglass boat without a traditional mold. All that is needed is a lightweight framework. In some the bulkheads and other frames which are usually fitted in the boat later can be used as part of the framework that you build the boat over.
This combination of rigid rods held together loosely, with pliable areas in between , is what makes C-Flex unique in construction materials. In our knowledge, it is the only self-supporting material available today which will conform to compound curves without having to be stretched or deformed in some way. Furthermore, C-Flex will bend sideways, a property which virtually eliminates the problem of having to fit or spile the ‘planks’. Most boats can be built by starting the first ‘plank’ parallel to the sheer line then butting the next ‘plank’ right alongside all the way to the keel.
Aside from the obvious advantage of being able to build an all fibreglass boat without a mold, C-Flex also affords the designer and builder the opportunity to save weight over a conventional fibreglass laminate without sacrificing strength.
This is because C-Flex is an unidirectionally reinforced material and is considerably stronger in the direction of it’s fibre orientation (lengthwise) than an ordinary fibreglass mat or woven roving laminate.This property is used to save weight in the hull shell by running the C-Flex along the lines of anticipated greatest stress (usually fore and aft).
The weight savings also translate into a cost savings. Even though the C-Flex itself costs more per pound than mat or woven roving, the completed hull shell will cost about the same as a hull built with just mat and woven roving. The advantages of being able to build without a mold and the weight savings are a bonus.
Hey Dave that’s a real boat. I’d like it OB.
I’ve seen the boat before but can’t recall her bottom. Think she’s V.
Would love to see interior picts!
Bit of thread drift here, but C-Flex is also interesting in that new 'one-off' fibreglass hulls can be made without a mold;
Boat Building in C-Flex Glass - Fine Line Boat Plans & Designs
http://seemanncomposites.com/cflex.htm
Plywood reinforced fiberglass is much more common and makes more sense as the plywood is strong and most importantly for boats stiff. So most often the plywood makes the fiberglass usable on the boat. But of course the same weight of wood is much stronger than traditional reinforced plastic.
FRP = fiberglass reinforced plywood or wood of any kind. It's becoming very popular in the quick and dirty DIY plan built boats. If I get to build mine, it will be plywood skin on frame and encapsulated in fiberglass and epoxy for waterproofing.
Been looking at this one for awhile now..
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This showed up at the Marina in Long Beach MS last week. Reportedly a 1929 Trumpy. New Owner took delivery about 10 days ago in La. I couldn’t find it on yachtworld. Les Bon Temps Roulez. (The Good Times Roll)
Hull is sheathed with C-Flex.
Dan I’d estimate well over 80 feet.
Perhaps 115’