Aluminum jon boats - Bookshelf
Important Note: While the addition of floatation to the hull of the boat may increase safety, it does not increase the carrying ... If aluminum jon boats are likely to be subjected to excessively harsh conditions, an advisable modification is the ...
Cheap, tough, and useful, today's aluminum jonboat is derived from. periment, its execution left much to be desired. Again, in an attempt to be as car-like as possible, a typical 16- foot boat might have nearly a third of its length covered by a ...
About this book
This comprehensive manual shows you how to go places and do things you never thought possible in a small outboard motorboat. A well-designed ruggedly built 17-footer, for instance, can fish offshore, circumnavigate Lake Superior, and crisscross the continent on inland waterways or on a trailer pulled by the family car. Small outboards are among the most versatile boats ever developed and are far more able than you might expect. Covered here are all the popular types--and some exciting alternatives as well as methods that may change your entire boating outlook. Aided by contributions from other experts, veteran outboard skipper David R. Getchell, Sr., offers a wealth of useful facts and special savvy that reveal for the first time in a single book the true potential of these democratic boats 20 feet and under. Here are the means to understand what can be done, and the way to do it safely, including: how to judge a boat's potential and capabilities based on design and construction; how to rebuild an older boat; how to handle a little boat in big seas, surf, or shallow water; how to navigate; how to read the weather; how to head upriver or offshore; how to trailer your boat; how to manage and equip it for camp cruising on a nearby lake or for subarctic exploration; and how to care for the boat and motor.
Volume I contains the results of performance tests of designs developed in this work plus additional designs developed elsewhere that were intended to meet the same criteria. (Author).
About this book
Conventional jon boats have stability and operational characteristics which make them inherently less safe than other recreational boats. Four boats are studied to determine static and dynamic stability, underway stability, and speed under power. Results are quantified by tests performed in a test tank and in the water. Test procedures used are presented in an appendix. Modifications are attempted to improve the stability and handling of two of the boats. These modifications consist of bilge keels to damp out rolling and foam pontoons to improve powering characteristics by altering the bottom shape. Results of these tests were used to design a second generation safe jon boat. This design incorporated floodable aluminum pontoons, open at the stern, providing the desirable bottom shape for planing with considerable improvement in transverse stability at rest due to the entrapped mass of water. The design is judge to not greatly increase cost or weight, keeping both these factors to less than 20% increase, and does not degrade any of the other desirable qualities of jon boats. Six hundred feet of documentary film clips are available from the Coast Guard R and D Center as a visual supplement to this report. A written narrative is included as Appendix C to this report. Volume I contains the results of performance tests of designs developed in this work plus additional designs developed elsewhere that were intended to meet the same criteria. (Author).