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This is a excellent example of Boston Whaler’s classic 5.2 Harpoon, manufactured in 1979. It boasts BW’s foam sandwich construction, a planeing hull, mahogany seats & trim, spacious cockpit, wide beam, stable behavior, and is self-bailing. The bailers were replaced 3-4 years ago. It has new (2016) spars & standing rigging and the mahogany woodwork has been recently refinished. It has a stainless steel boom crutch and space to hold an ice chest. It is set up for racing with hiking straps, spinnaker hardware & pole, & racing compass. It comes with five sails (original main w/battens, new main w/o battens, original jib, new storm jib, & new(ish) spinnaker), plus a 2 HP Honda OB motor. I purchased the boat in 2003 and have always dry stored it w/a full cover. The original cuddy was removed to make more room in the cockpit, and can be easily reinstalled. The hull is in excellent shape. The centerboard, because of swelling, has had to be worked on so it pivots cleanly, although it sometimes still requires a little help. In the 17 years I’ve owned the boat I’ve not sailed it more than a dozen times a year, & some years much less. The OB motor has probably less than 50 hours on it and starts easily & runs smoothly. The galvanized trailer is new in 2020 & has a spare tire. The boat can be viewed on the North shore of Lake Pontchartrain in Mandeville, LA.
Equipment: 2 HP Honda OB motor; 2020 McClain galvanized trailer; 5 sails; hiking straps, spinnaker hardware & pole, & racing compass; original cuddy; full cover.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
An open cockpit version was also available without the cuddy/cabin.
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