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DUDLEY DIX YACHT DESIGN Paper Jet 14 Plywood Stitch & Glue Sailing Skiff |
This design won an Outstanding Innovation Award at the Wooden Boat Show 2007 |
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Our newest dinghy design, this is a modern performance skiff concept with some traditional touches. |
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| The Paper Jet 14 is designed primarily as a training boat, with the intention that it can cater for a wide range of sailing skills. I wanted a boat that will allow a club to race it as a class boat that will give exciting sailing to those who have the skills but will also allow less experienced sailors to develop their sailing skills in the same boat at a much lower level of performance. The same features that I designed into it for club use will allow a family to use one hull as the platform on which Dad can have his excitement of blasting across large expanses of water but junior can sail the same boat (if he can pry it loose from Dad's grip) with a smaller rig and at slower speed. I am not trying to produce a design that will sail the pants off any of the other single-handers. It is fast and it will be really exciting to sail with the Turbo rig, but from the outset (this boat has been in the back of my head for over 10 years) it is intended to provide an economical path for sailors to progress between boats like the Optimist and the costly single-handed skiffs without having to trade up their boat each time to go the next step. They can build a Paper Jet at the cheapest level or the level that they think that they can handle and progress from there. Meanwhile, as long as Dad is not out sailing, the kids can use the same boat at a more basic level. It makes sailing more viable for many families. With time and skill improvements they can move into more costly boats if they feel the need. |
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| This versatility is achieved by making some of the components modular. The wooden mast has two interchangeable carbon topmasts and two mainsails of very different sizes. These items, along with a jib, asymmetrical spinnaker and retractable bowsprit, are used in different combinations to give the different rigs. The mast is supported at gunwale level by an X-shaped brace that distributes the loads, stiffens the hull and gives two mast positions. The forward one is used for the Lite rig and the aft one for the other two rigs. Much of the rigging uses details borrowed from gaff rigs, using lashings and soft eyes instead of stainless steel hardware. These tie the standing and running rigging to the hull and boom with greater strength than thru-bolting stainless straps to the wooden structure, also reducing cost and weight. The mast and boom are hollow timber, constructed by the birdsmouth method but modified to produce a very attractive striped appearance. This is achieved with alternating strips of cedar (for lightness) and poplar (for strength and stiffness). The sail track is a length of plastic pipe that is split along one edge and epoxied to the mast and faired in at the sides. The carbon topmast is formed over a shaped foam core and slides onto the top of the wooden mast just above the hounds. |
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Hull construction is stitch & glue plywood with a difference. The entire boat is built from 4mm plywood, so it is very light and needs more internal support than is normal with thicker plywood. I did this by fabricating a full-length plywood ladder-frame backbone that has interlocking transverse plywood frames. This necessitated securing the framework to building stocks for rigidity until the hull skin was complete. After completing the hull skin, it can be released from the building stocks for the remainder of the work. The stocks continue to serve as a support for working on the boat either right way up or upside down, depending on the work that is being done. This keeps it at a convenient and comfortable working height. The detailing that I have worked into this design is simple but it give loads of opportunity for showing off your woodworking and finishing skills. I used cedar for lightness along gunwales and for the wing leading edges but capped them with poplar to give a nice contrast while adding strength and stiffness to the structure. The result is a very light boat (hull weigth less than 100lb) that is also very stiff. The hull shape is hard chine, with a V-bottom that twists from vertical at the bow to almost horizontal at the transom. The wings are intentionally low and horizontal so that the leeward rail will immerse if the boat is over-powered in gusts, adding buoyancy to leeward to help her recover. The wings have airfoil shaped leading edges to generate lift, also to help her to recover. Most skiffs have wings that can trip the boat if immersed, causing a capsize. These wings are designed to cancel out that tendency and can also serve as additional planing surfaces. At this stage I have built the Standard and Lite rigs but have not yet started on the additional components for the Turbo rig. I will add those as time permits. Construction plans are nearly complete and the building manual is in progress. The manual is illustrated with many photos from the 100s that I took while building. Kits will be available from suppliers in various countries, to be ordered directly from those suppliers. Please visit our kits page for links to the kit suppliers. We exhibited the Paper Jet 14 at the Wooden Boat Show at Mystic Seaport In June/July 2007. In the Concourse de Elegance the judges awarded her an "Outstanding Innovation" award for the combination of features included in her design. |
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| Material List |
CHARACTERISTICS
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LOA 4.10m (13' 5") |
Beam 1.63m (5' 4") |
Draft 0.12/0.8m (5"/2' 8") |
Hull weight 45kg (100lb) |
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All-up Weight approx. 68kg (150lb) |
Sail Area Lite 7.3sq.m (79sq.ft) |
Sail Area Standard 10.3sq.m (111sq.ft) |
Sail Area Turbo 14sq.m (150sq.ft) |
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Please note that our plan prices include for adding imperial measurements to our metric designs if needed by the buyer. |
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This page was updated 8 May 2008
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