A 24' 5" V-Bottom Yacht Club Tender
By William Atkin
Yacht Club Utility Tender
This present design shows a very useful kind of motor boat and one that should be of especial interest to yacht clubs, boat yards, mariners, and wherever else a small boat is needed for passenger carrying, towing, regatta committee service, and allied purposes. Furthermore with minor changes in the arrangement of the cockpit the boat would also be an excellent one for fishing on salt water or fresh. Pennant was designed first to be a safe and able sea boat; second to handle well; third to be stiff; fourth to tow well; fifth to have plenty of reserve buoyancy; and sixth to have fair speed with modest power, the latter being a condition all too often forgotten in the design of motor boats of all types and sizes.
The arrangement plan shows proper decks fore and aft, narrow waist decks and a cockpit 15 feet 10 inches long. The floor of the cockpit and the seats are well down in the boat thus keeping the weight of the passengers low to the advantage of stability and balance. There is comfortable seating room for 20 persons. I do not feel the boat should ever be burdened with more than 25 grown persons including the helmsman. The deck is provided with heavy mooring and towing bits made of 3 1/2 inch by 3 1/2 inch white oak and stepped properly for strength. The masts are attractive trimmings and will delight the race committee; flags now-a-days have as much to do with racing as the craft that enter, therefore the noble sticks fore and aft, well stayed and stepped solidly on the keel below. The starting gun should have its place on the after deck, loosely lashed down to prevent its kicking overboard.
The design shows a V bottom hull having an over all length of 24 feet 5 inches, a water line length of 23 feet, a breadth of 7 feet 11 inches, and a draft of 2 feet 1/2 inch. The freeboard at the bow is 3 feet 4 inches, at the lowest place in the sheer, 2 feet 5 1/2 inches, and at the stern 2 feet 6 1/2 inches. The displacement of the boat to the designed water line is, 4,900 pounds. A safe load would be approximately 20 persons, say 3,500 pounds. The keel is long and straight, the purpose of this being to prevent the boat from falling off when coming alongside a float or larger vessel, and, of course, a straight keeled boat keeps a true course while underway. The rudder is of generous area and deep enough to catch the full diameter of the propeller slipstream. There is little sheer. A high bowed and low waisted boat is an unhandy one for taking on and discharging passengers from a float or other small vessel.
The hull sections show a minimum of deadrise and will therefore have excellent stability. All the bottom sections are straight and in what I call, continuity. The topside sections at the ends of the hull are moulded, the middle topside sections are straight. There is rake to the transom to prevent water from slopping up when the boat proceeds astern. The flare forward is more than generous, assuring dryness in a slop. Now turning to the stern it will be seen there is a heavy shoe protecting the rudder, propeller and shaft. I might mention that the shoe will permit Pennant to run over mooring lines, painters, lobster pot lines and other underwater hazards with some chance of passing clear, something which would be impossible where the propeller hangs on a strut and the rudder is unsupported at its heel. A hull with a long straight keel can be laid on the beach for painting or other overhauling, does not require a cradle for hauling out and is inherently strong because of the heavy keel. The motor box covers a Palmer 132 cubic inch motor of 25 horse power and turning 1800 r.p.m., and the expected speed of the boat is 12.5 miles an hour.
Plans for Pennant are $100




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