SPONSONS Simple to build, simple to install and （安装和外伸建造简单,简单）.pdfVIP

04/25/10 SPONSONS Simple to build, simple to install and simple to remove. Definition: A short, curved, air-filled projection on the hull of a boat, imparting stability in the water. 8 Pages Sponsons on this boat are utilized to help stabilize the craft in choppy water or high wind conditions, or both. The unique sponsons described and outlined in this document are used to add lateral buoyancy to a narrow beam boat, specifically the TOTER 2 Sailing version. The concept is simple, increase the beam by joining a sponson to each side of the main hull module, thereby dramatically increasing the righting buoyancy of the entire craft. The plans as defined can also be incorporated into other small boat hulls, with little modification, and at a low cost. The picture at right is of an assembled, but unfinished, sponson. It is constructed of 1/8 inch plywood, with internal baffles. It is all glued together, sanded, and the seams finished using the Tape Glue process. This produces a strong, sealed, yet lightwieght (2 lbs) structure. It is crucial that the sponsons be easily attached, and removed, from the boat. Not everyone will need them. Because the cross-section of the sponson is a triangle, it is simply a matter of using it’s dovetail qualities to align and secure the bottom edge to the hull. Locking the upper end to the hull is provided by push-in locking pins located along the gunwale rubrails. Alignment Locking Pin The total cost of building t