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How do you contend with boat motion? Without some way to inhibit motion, all boats roll. Fortunately, many roll-inhibiting factors can be designed into a hull, making its motion smooth enough and comfortable enough, under most conditions, to avoid the need for flopper stoppers or stabilizers. To keep costs down, we strove to design a comfortable motion into Briney Bug's hull. Once afloat, a boat's motion can be evaluated for comfort by timing its roll using the following test: Get the boat rolling (while tied to a dock is acceptable) and time (in seconds) one full cycle- one side to the other side and back again. This is the roll time. Divide the boat's beam by 3.28 and multiply this answer by 1 and 1.1. For comfort, the roll time should fall on or between these two figures. We were pleased to find out that Briney Bug's roll time fit within these parameters If a boat's motion is too fast or too snappy, the installation of more weight up high can slow the motion. One low-tech method to accomplish this is to install a mast and rigging. Contemporary sailboat designs pare weight from aloft to improve performance, but in a cruising boat, where a comfortable motion is desired, the mast and its rigging need to be heavy enough to slow the motion. This means they will usually need to be heftier than is customarily seen, and most of the stuff- the mast, boom, spliced eyes, blocks, etc., can easily be made, instead of purchased, making it less expensive. In the unlikely event it breaks, this stuff is also easy and inexpensive to repair. An added plus, once a mast is installed, is that sails can be added to further dampen the motion. The more a hull deviates from a full displacement design the more difficult it is to tame its motion using low-tech methods. This was another reason we chose a full displacement hull, plus, the hull being more “sailboat-like” handles a sail plan better than other hull designs. —Rudy and Jill Sechez Here’s how the Briney Bug story is presented: What does Briney Bug look like? Editor’s note: Rudy and Jill Sechez, when they are not away cruising, live aboard Briney Bug in Port St. Joe, Florida, and provide boat and yacht repair services. They can be reached at 850-832-7748 or via e-mail by clicking here. |
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Simplicity taken to the max |
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© 1997-2014 Water World Productions, formerly Trawler World Productions. All rights reserved. Reproduction of material from any trawlersandtrawlering.com page without written permission is strictly prohibited. Any copyrighted images remain the property of the copyright owner and are believed to be used with permission. Unsolicited letters, e-mails, articles and other materials submitted to us may be published, distributed and stored by Water World Productions and its assignees in whole or in part, in print or by any other means, including but not limited to electronic, and may be edited for clarity and space. Trawlers & Trawlering and its abbreviation T&T, I'd Rather Be Trawlering, Passagemaking Under Power and its abbreviation PUP, Trawler Buy-Sell-Trade, Trawler News, Circumnavigator, and Power Catamaran World are trademarks of Water World Productions.
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