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How to organize the construction of a steel or aluminum round bilge hull
Forming of shell plates at Snijtech Principle of shell plate templates
Floor to frames connection Setting up of frames If you can weld, you can do it We experienced that there is a growing interest for round bilge computerized and precisely cut plate kits, including pre-formed shell, keel and rudder plates, bended frames and deck beams using full size frame patterns and shell plate templates to produce a perfectly fitting package. This all means even an amateur builder can assemble a round-bilged hull. A building manual of a round bilge hull using pre-formed shell plates, bended frames and deck beams will be supplied with the kit. The assemblage method described was based at the most professional and time saving building system. Compared with the conventional building method you can save up to 70% of the building time. Although almost all shell plates must be formed of a real round bilge hull, the 3D pre-forming of the shell plates is relatively low against a radius chine one where the forming is concentrated at the radius sectioned mid plates. The bending of the continuous running frames is easier too. We co-operate with specialized companies in several countries who offer steel and aluminum plate packages, with or without the necessary profiles such as angle bar, T-section, flat bar, tube and round bar. The computerized numerical cutting (CNC) procedure is marking with a fibre pin according to the rules of Lloyds Register followed by plasma cutting with procesgas of pure oxygen to grant a high quality weld. The numbers between brackets (1) .. (4) as shown on the price indication sheet refer to the price category column on the list of materials to show you what will be delivered. (0) The profiles for the building jig of the multi chine versions. (1) There are three CNC produced plate kit versions (steel sandblasted, steel sandblasted and coated with Sigmaweld MC www.sigmacoatings.com/downloads/00_7177.pdf and aluminium) with several keel versions available. The plate kit can be extended with (1-1) doghouse. (2) Stainless steel AISI 316 or AISI 316L plate kit as stemhead / anchor fitting and chain plates for the steel versions. (3) The profiles kit, supplied at standard trade lengths of 6 m or shorter. (4) Stainless steel AISI 316 or AISI 316L profiles kit as shown on the list of materials. As Van de Stadt Design will supply you with full size plots of frames, deckbeams, superstructure and cockpit patterns on Mylar film, the order of the same, plotted on MDF board is not strictly needed. As you have to walk, work and weld on the patterns, professional yards prefer MDF board however. We advice to cover the Mylar's with 4 mm thick Plexiglas. Contrary to the hull builder the carpenter prefer the Mylar's as he can transfer the shape of the bulkheads to plywood sheets by nail markings through the Mylar. To shape the shell plates of a round bilge yacht you need quite heavy and expensive machinery and experience. To grant a perfect pre-forming of the shell plates we supply "viewing moulds" for all shell plates. Consider to put out to contract the bending of the frames and deck beams also . If the indicated price is within your expectations and if you are seriously interested to order a kit of her please let me know, we will supply you with a time limited binding offer, eventually with shipping expenses. If you wish more information regarding a building kit, please contact me at info@YachtCD.com . In fact it is easy to explain. The kit contains all exactly cut plates up to the smallest knee. The building of round bilge hulls, using a kit with pre-shaped shell plates, bended frames and deck beams belongs no longer to very well utilized professional yards. Even amateur builders are able to assemble a round bilge hull. The assemblage of a hull is based on the fact that all parts are very well cut and shaped. Marking lines and part identifications will grant a perfect position in the hull structure. To assemble the hull no jig or cradle is required and will reduce the building time to 25% to 30% only compared to the conventional building method. To speed up the collection of the parts needed we supply you with additional construction drawings with part identifications, a part list with part descriptions and nested plate lay-outs including all part identifications also. To be able to use the best possible building method, a building manual with a lot of valuable hints and photographs to guide you through the building process is available. In fact the manual was made in co-operation with Roger McMillan. Roger, an amateur yacht builder but professional writer is assembling his Skipshelling I. Blom & Zn. supplied round bilge aluminium kit of FORNA 37 in Australia. |
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