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  • Archive: Design of Seagoing Rowing Boats  0
    Seagoing rowing boats of high performance are difficult to design because of the multiplicity of conflicting factors to do with ergonomics and seakeeping, combined with the low power available to drive the boat. (Added: 6-May-2002 Hits: 1174)  My Links | Rate | Cached | Archive
  • Essential Design Data  0
    Being concerned about your vessel's survivability in ultimate conditions makes ultimate sense! In view of the cost of the vessel, and the cost of the entire expedition that any ocean voyaging represents, the cost of thorough design analysis does not amount to a significant percentage of the cost of ownership. It does however amount to a high percentage of one's peace of mind on the briny deep. Michael Kasten. (Added: 10-Jan-2002 Hits: 5875)  My Links | Rate | Cached | Visit Essential Design Data
  • Estimating Boat Building Costs  0
    This article looks at the economics of boat building, including the possible advantages of building a boat outside the US. This article provides a method for estimating approximate construction costs and design costs for creating a new custom yacht, then compares those costs to those of production boats. Michael Kasten (Added: 10-Jan-2002 Hits: 4408)  My Links | Rate | Cached | Visit Estimating Boat Building Costs
  • Free Standing Rigs  7.00
    Free-standing rigs are inherently safer, simpler, and more aerodynamically efficient than conventional rigs. They are safer because stayed rigs are held up by hundreds of little parts, any one of which could fail or slip out and cause the rig to fall down. Eric W. Sponberg. (Added: 10-Jan-2002 Hits: 3898)  My Links | Rate | Cached | Visit Free Standing Rigs
  • Good N.E.W.S. - New Epoxy Wood System  1.00
    Plywood has always been a favorite material for home builders. The increase availability of good grade epoxies has further enhanced the reliability of plywood constructed vessels. The Gougeon brothers' wood epoxy saturation technique (W.E.S.T.) has advanced the use of laminated wood structures to a point where yachts can be built far stronger and lighter than was previously thought possible using any other material. Bray Yacht Design. (Added: 10-Jan-2002 Hits: 3804)  My Links | Rate | Cached | Visit Good N.E.W.S. - New Epoxy Wood System
  • Hydrodynamic Drag of Small Sea Kayaks  0
    The total calm-water resistance (wave plus viscous) of four popular single seat sea kayaks is calculated and compared with experimental results. Michell's integral is used for the wave resistance, the 1957 ITTC line for the skin friction, and a simple empirical formula for the form drag. The agreement of the predicted drag with experiment is generally very good, especially at the lower speeds considered in the present note. At higher speeds, discrepancies are probably due to sinkage and trim effects. Leo Lazauskas, John Winters, and E. O. Tuck. (Added: 10-Jan-2002 Hits: 2324)  My Links | Rate | Cached | Visit Hydrodynamic Drag of Small Sea Kayaks
  • Hydrofoil Basics - A Brief Tutorial  0
    A United States patent for a hydrofoil was defined in the late 1880s, about the same time as the early airplane and airfoil patents. The earliest record of a successful hydrofoil flight is 1894 when the Meacham brothers demonstrated their 14 foot test craft at Chicago. The early attempts to exploit the hydrofoil concept were frustrated by lack of suitable structural materials and power plants. However, advancement in these areas has permitted development over the past 30 to 40 years of reliable and effective hydrofoil ships for both military and commercial applications. (Added: 12-Jan-2002 Hits: 3733)  My Links | Rate | Cached | Visit Hydrofoil Basics - A Brief Tutorial
  • Ideal Passagemaker Hull Form  0
    Most of the elements of good boat design are readily apparent when looking at a boat. Among them, one can usually fairly easily judge whether a power vessel is designed to be a true passagemaker, a good coastal cruiser, or possibly a fast boat for short hops in protected water. Michael Kasten. (Added: 10-Jan-2002 Hits: 4331)  My Links | Rate | Cached | Visit Ideal Passagemaker Hull Form
  • Keel Fatigue Analysis  0
    In recent years the performance of monohull racing yachts has dramatically increased, partly due to the introduction of canting keels. This new technology brings challenges for engineers to ensure the keels are designed safely, using available tools and codes of practices. As we have seen as recent as 2013 keels still fail. This is despite the use of high strength materials in their designs. The truth is that their strength, so trustworthy under static loads, is no indicator of fatigue life under repeated, smaller loads. (Added: 29-Jul-2014 Hits: 304)  My Links | Rate | Cached | Visit Keel Fatigue Analysis
  • Low Drag Racing Kayaks  9.00
    Genetic algorithm techniques are used to find optimum length and other principal dimensions for K1, K2 and K4 class kayaks over a range of speeds and displacements. A three parameter hullform family is used to investigate the effects of waterline, cross-section, and buttock shapes. Leo Lazauskas and E. O. Tuck. (Added: 10-Jan-2002 Hits: 1970)  My Links | Rate | Cached | Visit Low Drag Racing Kayaks
  • Archive: Low Drag Rowing Shells  9.50
    A displacement vessel of a given loaded weight has a theoretical optimum length which minimizes its total (viscous plus wave) calm-water drag. This length is usually somewhat greater than that of conventional merchant or naval ships but is in an appropriate range for competition boats such as rowing shells. Some simple examples are given to illustrate this property. E. O. Tuck and Leo Lazauskas. (Added: 10-Jan-2002 Hits: 1831)  My Links | Rate | Cached | Archive
  • Metal Boats for Blue Water  10.00
    Any discussion of metal boats inevitably encounters the question of whether a boat should be aluminum or steel. Not often realized is that there are other metals that may be effectively used. "Metal Boats for Blue Water" is intended to provide an overview of the possibilities, and to discuss why one might choose metal for a boat's structure. Michael Kasten. (Added: 10-Jan-2002 Hits: 2800)  My Links | Rate | Cached | Visit Metal Boats for Blue Water
  • New Life for Amnesia  1.00
    A decision was made to look into various retrofit options and the choice was narrowed down to a bulbous bow and some form of roll dampening fins. There has been considerable interest in the advantages of bulbous bows and a large data base has been established on the West Coast from work done on fish boats and long range motoryachts. The roll dampening fins were an extra, considered while the boat was out of the water... Bray Yacht Design. (Added: 10-Jan-2002 Hits: 1332)  My Links | Rate | Cached | Visit New Life for Amnesia
  • Plywood Boat Building  2.00
    Plywood has always been a favourite material for home builders. Unfortunately plywood has not always enjoyed a good reputation. Poor quality vessels have been launched by builders who did not have a good understanding of required techniques, or chose to ignore them. At the same time, however, many fine vessels have been built to high standards, with excellent results. Bray Yacht Design. (Added: 10-Jan-2002 Hits: 6555)  My Links | Rate | Cached | Visit Plywood Boat Building

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