Go to Sailing Texas classifieds for current sailboats for sale Boston Whaler Harpoon 5.2, 1980 sailboat for sale This is a 1980 Harpoon 5.2 in excellent condition. 17’ LOA, beam is 7ft, very stable. Centerboard controlled by pulleys. Mast is 25 feet. Titled and registered in Louisiana. Was garage kept in Oklahoma and central Texas for most of her life, never left in the water in a slip. Sails (main and jib) and rigging in good condition. New custom motor mount recently installed. Boat can easily accommodate three adults for racing or up to 5 for cocktail cruising. Removable cutty creates storage space, ideal size for camp cruising. Various other accessories included, extra line, pulleys, etc. Magic tilt trailer in good condition included, recently repacked bearings. I trailered the boat all the way from Oklahoma last summer and it drove great. I bought this boat last summer and love it, but am looking for something slightly smaller and simpler to single hand. Would trade for a wooden or fiberglass sailing dory, drascombe sailing dinghy, or the like. Would delver within 600 miles of New Orleans if trading. Listed price does not include the near mint 1993 Yamaha 4hp long shaft motor with very few hours, indoor kept. I would gladly keep the motor, but will include it for an additional $500 (less than what I paid a few months ago). New Orleans, LA
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 √LWLA 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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