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Dinghy Sailing Programme. Home. Courses. Recreational. Dinghy Sailing Programme. Dinghy Sailing Programme. IYT Worldwide is pleased to offer a series of dinghy sail training courses for young sailors. The programme consists of four levels: Bronze Level � Start Sailing. Silver Level � Safe Sailing. Gold Level � Independent Sailing. Platinum Level � Perfected Sailing. In addition to these four levels we will continue to expand Dinghy Outboard Motor Weight 500 the programme offering specialty sailing courses for high speed sailing and racing. DIY Wood Boat Books page, step by step instructions for building Crescent using modern plywood building techniques and materials. Yours to download (pdf) for only $ 5. Graefin� Simple lines are adapted to plywood construction that�s strong, light and that keeps Breeze-Baby�s bilges dry. Click Here for the Plans. You can take her with you atop your car or on a lightweight trailer for summer fun wherever you vacation or get in a week-end�s sailing. Iain Oughtred is the well-known designer of elegant glued-lapstrake plywood boats, including the Acorn Skiffs, Gray Seal, Caledonia Yawl, Whilly Boat, and more. We have been offering his detailed boatbuilding plans for years, so the book was a natural fit. And, you may have noticed many of his designs in Wooden Boat magazine's Launchings column. With the book in hand and a set of his plans, you can hardly go wrong. Additional info: THE AUTHOR After a successful career in centreboard racing dinghies, Iain Oughtred became one of the leading lights of the British wooden boat revival, designi.

Since so many projects in Epoxyworks incorporate plywood, we felt it might be valuable to discuss briefly the types of plywood and some construction methods best suited to it. However, plywood also has its weak points.

There are limits regarding shape development because plywood can be compounded bent in two directions at once very little. In addition, plywood contains end grain on all its edges, which makes it susceptible to moisture migration and damage.

Understand plywood grades All plywood is graded based on the quality of the veneers and the size and number of permissible voids and patches. Grades A-C are the most common. To be suitable for marine construction, panels must be made with waterproof glue and marked as exterior plywood EXT or marine plywood.

As a general rule for boat projects, use marine-grade plywood because the wood used to make it is of higher quality with smaller voids and fewer patches. Inner veneers are also of higher quality, grade B or better.

Marine plywood is therefore more stable, has less potential for checking, and the overall strength and stiffness are better than exterior plywood. When you consider the overall cost of a project, the price for marine grade plywood is well worth it. Aircraft grade plywood is also very high quality and might be appropriate in specialized applications, such as a cored panel wing mast.

Some builders have used door skins 3mm thick when making a laminate of multiple layers, but you need to make sure they are glued with exterior grade glue and are of adequate quality. You should not use plywood underlayment for boat building because of its poor quality.

Products Standard PS applies only to softwood plywood. Species: Douglas fir No 1 or western larch. Glue: waterproof. Face and back veneers A-A, A-B, B-B smooth cut and Build A Dinghy From Plywood List free of knots, pitch pockets and open splits and other open defects. Inner plies B or better. Species: untreated tropical hardwood veneers with suitable level of resistance to fungal attack. Glue: waterproof glue.

Face veneers free of knots and other than solid pin knots no more than 6 in any 1 square foot area. Core veneers shall be the same as those for face veneers. No gaps in faces. In core, not more than one gap no wider than. Aircraft grade plywood meets all specifications of MIL-P, which calls for shear testing after immersion in boiling water for three hours. It is made of imported African mahogany or American birch veneer Dinghy Boat With Outboard Motor General laminated in a hot press to a hardwood core of poplar or basswood with waterproof glue.

Check the plies Plywood typically comes in an odd number of plies in order to achieve balanced construction. The number of veneers on each side of the core layer must be equal in number and thickness or the panel may warp. When you buy plywood, lay the sheet down on the ground. Select plywood where the total thickness of the two outer plies equals the thickness of the core. One quarter inch plywood and thicker is available in 5 or more plies. More plies are better because the panel is more dimensionally stable, less likely to warp and stiffer than three-ply.

Know the wood species Most Small Dinghy Outboard Motors Research marine grade plywood is made from tropical hardwoods, like African mahogany, sapele, utile, and okoume. Some wood species are more durable than others. Coating surfaces especially exposed end grain with epoxy greatly protects less durable woods from the harmful effects of moisture. While okoume is considered a non-durable species, we have had good long-term results with it. The biggest challenge with Douglas fir plywood is the propensity of its outer face veneer to check, that is, split along the grain.

This is especially true when the outer surface forms a curve perpendicular to the face grain. Covering fir plywood with 6 oz fiberglass fabric is mandatory to contain the checking. Limitations of pressure-treated plywood Many people ask about the value of pressure treated plywood.

Often, pressure treated plywood is heavily warped. This is primarily the result of the high temperature and rapid moisture take up during processing. Some plywood delaminates during the process. In addition, some pressure treating methods incorporate water repellant materials. Generally speaking, pressure treated plywood may be acceptable for house projects but not for boats.

Select the right plywood for the project With the many types of plywood available, it is important to choose and combine the types and thicknesses of plywood best suited to your project. For the kind of projects typically described in Epoxyworks, strength, durability and weight are primary considerations. So we usually choose somewhat specialized plywood to meet the particular requirements of the project. For example, on a wing mast I built twenty years ago, I was after light weight and flexibility.

I wanted the teak finish and flat, hinged panels. So I chose a plywood with a teak face, stiffness and dimensional stability.

The point is to select carefully the best plywood for your project. Plywood selection weighs flexibility vs. The wing mast required flexibility. A trimaran interior shows varied uses of plywood selected for their appropriate stiffness and finish. Building your own plywood Some folks opt to build their own plywood by laying up multiple layers of sliced or peeled veneer. You need a suitable flat surface and a method of applying pressure until the adhesive that joins the layers has cured.

Building your own plywood rarely saves money and the panels are often heavy. However, you can tailor your choice of a face veneer and it is possible to make some really beautiful panels. You also can make the panels whatever size you want.

When you laminate a hull, as in cold-molded construction, you are actually making plywood to a specific shape, that of a boat hull see Laminated construction gives lasting value. Joining plywood panels You can join plywood panels in a number of ways if you need sizes greater than standard ones.

Scarf joints are the best approach for strength and weight. Gougeon Brothers, Inc. The rule is to create a bevel 8 times the thickness of the plywood. Panels can also be joined with butt blocks, but this has the potential for exposing end grain at the butt. We like to dish out the butted area similar to a scarf and bond in fiberglass cloth. Construction methods with plywood Plywood is ideal for several construction methods.

Then you apply epoxy fillets and fiberglass tape to permanently join the structure in a rigid shape. Plywood has also been used successfully to build lightweight lapstrake boats. This construction method is limited to thin plywood and hulls with modest shapes, most typically multihull craft. Designing your own plywood boat used to be very challenging because if you introduced excessive compounding, you could have trouble laying out the plywood to the shape.

With stitch and glue construction, it is extremely difficult to predict panel shapes. Now, however, some excellent software is available so you can get accurate offsets for the true shapes of panels.

Watson Since so many projects in Epoxyworks incorporate plywood, we felt it might be valuable to discuss briefly the types of plywood and some construction methods best suited to it.

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