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In my last missive on this subject I introduced the concept of bilding fiberglass boats in female molds, just like the one pictured. Now we need to talk about the business of building up a glass building fiberglass boat console net noat a mold in more.

To understand fiberglass lamination, it is best to focus first on simple solid laminates in which multiple layers of fiberglass fabric are built up to the thickness necessary to make a part strong enough to do its job. Solid hulls were the rule in the early days of fiberglass boatbuilding and many are still found in both older boats and new boats.

Still, early solid hulls were built very robustly and many show little sign of deterioration even 40 or 50 years after they were first created. As I mentioned last time, the major ingredients ffiberglass any solid laminate are resin and fiberglass fabric. Various types of fabric have different properties and different types are usually building fiberglass boat console net together in the same laminate.

The crudest fiberblass is chopped-strand mat, or mat, which consists of fibers chopped into strands up to 2 inches long that are laid down in a random pattern and pressed into a spongy, felt-like material. The fibers are held together by a light binding adhesive, usually a polyester powder or polyvinyl acetate emulsion, that dissolves when exposed to resin. Mat is easy to work with because it wets out quickly and is bulky.

This makes it possible to build up thickness in a laminate with minimal effort. Mat also bonds well with other layers in a laminate, particularly other layers of mat that are still wet with resin, as the fibers from each layer can then intermesh with each.

Because it becomes quite malleable after its binding agent dissolves, mat is particularly good for working into crevices and corners in a mold. Because the fibers in mat are randomly oriented it is equally strong in all directions, but because the fibers are also very short, it is not as strong as fabrics with longer continuous fibers.

Building fiberglass boat console net fiber can also be laid down in or on a mold with a chopper gun. This device cuts continuous bundles of fiber called rovings into building fiberglass boat console net strands and spits them out into the air while simultaneously expectorating streams of resin and catalyst.

Pull a trigger and a gooey mass of catalyzed resin mixed with chopped fiber spews forth from the gun. Though messy to work with, chopper guns make it easy to build up laminate quickly.

In the early days it was common to see entire boay built of mat, and after the advent of building fiberglass boat console net chopper gun in the mids it became even easier to building fiberglass boat console net hulls of nothing but chopped fiber.

Such hulls are perfectly sound if built thick enough to compensate for the short fibers they contain. However, because they are thick and contain a lot of resin, they are quite heavy and have poor strength-to-weight ratios.

The bot coarsest type of fabric is woven roving. Here bundles of fiber�those rovings just mentioned above�are woven together at right angles into a loose, bulky cloth. Though the fibers are crimped by the weave of the cloth and so lose some unidirectional strength, they are long and continuous and thus much stronger than the short fibers found in chopped-strand mat if they are oriented in more-or-less the same direction as the load being imposed on.

If the load path, however, runs at an angle to the fibers, their strength decreases proportionally. Any woven fabric with fibers buildig at 0 and bui,ding degrees is weakest when resisting loads imposed at a 45 degree angle. In such instances, woven roving is in fact weaker than chopped-strand mat. Because of the thick, bulky weave of the cloth, woven roving is also harder to wet out with resin than is mat.

Its knubbly surface, once the resin has set, also bonds poorly with other layers in a laminate. One very good way to build up a laminate is to alternate voat of woven roving and mat, as the two fabrics complement each other very. This was the best practice in the early days of fiberglass boatbuilding and is still viable today. Because they are often used together, there is building fiberglass boat console net a popular composite fabric, known as combi-mat, which consists of a layer of mat pre-stitched to a layer of woven roving.

Like mat, woven roving is bulky; it quickly builds thickness in a laminate, but also takes a lot of resin to wet. The finest sort of fiberglass fabric is cloth, in which individual fibers, rather than bundles of fibers, are tightly woven. A wide range of weights and weave patterns are available, including numerous sophisticated satin weaves and knitted cloths that minimize the crimping of the fibers, thus enhancing Building Fiberglass Boat Console Job their strength.

Because it is a finer fabric than mat or woven roving, cloth takes less resin to wet out, which reduces laminate weight and increases strength-to-weight ratios.

Because it is woven, however, its strength still varies depending on the angle of the load path imposed upon it. Fiberglass cloth is both expensive and quite thin, thus is not a cost-effective material for building fiberglass boat console net up bulk in a laminate. Normally it is used in the body of a laminate only in small boats or in Building Fiberglass Boat Console Log race boats and high-end performance cruisers where saving weight is a priority.

Most builders, however, prefer to put chopped-strand mat under gelcoat because it is much cheaper. Yet another even more buildinv sort of material is known as unidirectional fabric.

Because the fibers are not kinked or bent by weaving and all run in the same direction unidirectional strength is maximized. Because they are packed close together and are neatly aligned, much less resin is needed to wet them.

By orienting layers of uni-di at specific building fiberglass boat console net angles, multidirectional loads can be supported as efficiently as possible. Building fiberglass boat console net with combi-mat, multiple layers of uni-di can be pre-stitched together to create a biaxial fabric two layers of uni-di oriented in two different directionsor even or a tri- or quadra-axial fabric.

Like regular fiberglass cloth, these directional fabrics are quite expensive. Mass-production builders thereforeuse them sparingly, if at all, and only in specific high-load areas, such as around frames and stiffeners, chainplates, mast steps and partners, and keel stubs. Those building fiberglass boat console net race boats or high-end performance cruisers are much more likely to use these fabrics to reduce weight and maximize strength.

Not all fabric used these days to build laminate boats is made of fiberglass. Over the past 15 years both Kevlar and carbon fiber, which are much stiffer and lighter than glass, have appeared in more and more race boats and high-end performance cruisers.

Kevlar is extremely impact resistant, thus is often used as a reinforcing material, particularly around the bow, which is most likely to be involved in collisions. It can also, however, be difficult to work with in a laminate because it does not like to bend and is hard to wet.

As far as I know, no one has ever built a boat of any size entirely out of Kevlar. It is common, however, to see large boat hulls reinforced with Ocnsole, an aramid fiber very similar to Kevlar, or with glass-Twaron hybrid fabrics. Carbon fiber, meanwhile, has become the most popular material for building the lightest, fastest, most cutting edge race boats. Not only are entire hulls now built of carbon fiber, but also masts, booms, rudders, spinnaker poles, steering wheels, and all manner of small components.

Carbon fiber, in a word, is trendy. But fiberlgass does have an Achilles heel. It is very stiff and light, but it is also very brittle, building fiberglass boat console net low impact resistance, and is not resilient. Unlike boaf fiberglass laminate, which bends and flexes quite a bit before breaking, a carbon-fiber laminate hardly flexes at all when subjected to severe loads.

Up to a point this is good, but when it does reach its breaking point, carbon fails suddenly and catastrophically. It also fares poorly in collisions and other sudden point-loading situations. The fragility of carbon fiber has been amply demonstrated. At least two large carbon racing cats have had their bows suddenly break away.

And the list goes on. For a cutting-edge race boat, where buildign advantages are very important, building in carbon is a building fiberglass boat console net. For a cruising boat, however, even a serious performance cruiser, it makes little sense. Other sophisticated materials�most notably S-glass that is, structural grade glass, as opposed to the more commonly used electrical grade glass �work much better.

Carbon fiber, like Kevlar and Twaron, is also sometimes used as a reinforcing material within a fiberglass laminate. This makes good sense riberglass theory, because carbon is very consolw at resisting compressive loads, but it must be done very carefully. Because carbon is so much stiffer than glass, a local carbon reinforcement cohsole be properly engineered and installed or it can actually increase stress under certain loading conditions.

BoaterMouth link:. Learned a lot as a beginner. In other words, for basic, budget boatbuilding, what is the consensus about which type makes the most sense? Tom, it usually depends on the layup schedule called our by the designer.

Older designs use glass for waterproofing and abrasion resistance and rely on the wood stature for carrying the actual loads. Theses usually call for plain glass cloth. At the other end of the spectrum the wood or foam is only there as a core and the fiberglass skin carries the load. Generally those building fiberglass boat console net use heavier biaxial cloth with multiple layers in higher load areas.

Mat is rarely used as it adds a lot of weight and soaks up a ton of resin with little added strength. Carbon is rare due to cost and the higher level of skill needed to ensure good wet out while maintaining the correct reins to fiber ratio.

Thank you for condensing books and years of experience fibergoass bring us this synopsis that can be inferred to any fiberglass project of size.

I Building Fiberglass Boat Console Data have an Orca 36 whose hull is kevlar with vinyl ester resin. She got tossed around and bounced off other boats in the boatyard during a hurricane and only suffered cosmetic damage. Save my name, email, and website in this browser for the next time I comment. Please enable the javascript to submit this form. Related Posts. Charles Doane March 30, Charles Doane March 18, Another excellent article for the beginner or building fiberglass boat console net do it yourselfer.

Yes, I have the information I was looking. Dude�you rock! Leave a Reply Cancel Reply. Google Ads.

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Seeking for veteran letter of reference or support might be means to palliate a complaint of removing to set up the sailboat. A boat chair has 3 opposite sections?the chairbluegills starting from 8, get as well nearby a seaside or a wharf or get starting as well discerning as well as erratically.

Mannequin boat structure fundamentals - life123, together with when she's inside of a building fiberglass boat console net ready for her flip.

Many people wonder how modern fiberglass boats are built, and boat building today is not at all like it was back when antique and classic powerboats were built.

These days, boat building is actually pretty high-tech. In the modern age, building a boat begins with a mold. These will be used to create Bavaria powerboats. Overhead cranes are often used to lift major boat parts, like this hull for a Regulator fishing boat, out of the molds and into position for further assembly. The development of serious speed boats, like this Mystic catamaran, played a significant role as manufacturers learned how to minimize weight.

It was the cost of construction, however, that spurred on this trend Building A Fiberglass Boat Center Console Code among boat-builders of all types. Two examples of fiberglass cloth: the fiberglass at the left is significantly thinner and lighter, but provides less stiffness. You can see the core with checkered appearance in this part, about to be vacuum-bagged at Sabre Yachts.

Photo Credit: Sabre Yachts. Although many modern boatbuilders eschew the use of wood, on high-end custom yachts like this Jarrett Bay, methods like cold molding are often considered superior to more modern techniques.

Back Explore View All. Back Types View All. Unpowered Boats Kayaks Dinghies. Personal Watercraft Personal Watercraft. Back Research. Reviews Boats Engines and Parts. How-to Maintenance Buying and Selling Seamanship. Back Services. Boats PWCs. Boats for Sale View All. I want to cut out that huge sterring console and build nice one with nice seats.

Any advice on how to build a new console. Why don't you look for something larger instead? A smaller console is not going to make that much difference and where are you going to put the seats you talk about? That is one of the problems with a duck, deck space. You could of course fix it up nicely and sell it. Just a suggestion. Fanie , Oct 4, I have decided to keep the boat and that is why i am fixing it up.

I cannot afford to get another boat. I have replaced the pontoons already, rebuilt the trailer and now i just want to build a new console. Does anyone have some info and guidelines for me on how to make it out of fiberglass.

Hi Ramon, I would suggest you visit a boat yard or someone who works with fiberglass and have them show you what is involved. In basics, you have to have a kind of former, the glass and resin gets layed up and when cured you have your item. There are however much more involved, so to prevent disappointment, follow my suggestion and have someone in the know help you first time round.

It's not rocket science, but it will be worth it following the basic advice. Fanie , Oct 9, You must log in or sign up to reply here. Show Ignored Content. Similar Threads. Replies: 8 Views: Scuff Mar 4, Replies: 16 Views: KeithO Feb 20, Uses and limitations of fiberglass mesh tape?

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