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Helms 24, 1978 sailboat for sale Located at Lake Hefner in Oklahoma City
1978 Helms 24ft, 8ft 6in beam, 4ft draft fixed keel, outboard rudder.
Spars and standing rigging are in good condition. Sails include Main with boom cover, Genoa with UV cover and roller furling system, sails are over 15 years old with light use and are in good condition. Interior has new covering on all cushions. Interior items are folding table on bulkhead, alcohol stove, built in ice box, porti potti, new life jackets and anchor. Over all condition is good, two tone deck has some faded areas and also needs a high pressure wash which will be done for the buyer, hull has been repainted with Polyurethane sever years ago and is in good condition. Bottom paint is good, another coat would be helpful before launching. To my knowledge the boat has not been in salt water. More detailed photos available on request, Offers considered.
OPTIONS available: trailer $2000, Nissan 8hp two cycle long shaft motor $800, Volvo 3.9hp long shaft motor $300
$1,950 Offers considered
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)
Shoal draft version: 3.00’ / 0.91m
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