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Fully rigged & ready to sail today Turnkey boat, trailer, cradle, beach wheels Hobie 18SX #1330 White hulls and tramp 1998 year with taller SX Comptip mast Magnum extended wings 2020 Whirlwind sails - white fully-battened fat head main with hull number and roller-furling jib with soft shackle Many upgrades for fast fun sailing by experienced sailor (not raced) Dyneema shrouds, main halyard, tiller keepers, jib roller furling line & tramp lacing High tech low stretch mainsheet & jib sheets Twin tillers, adjustable length Jib sheets cross sheet to windward side either of two cleats Shroud bases, Colligo shroud distributors and traveler cam cleat new in 2021 Beach cradle with rollers, tiedowns and XL locking beach box Beach wheels with new hull cradles and cable lock Loadmaster trailer carries both cradle and boat together Storage box additional on trailer Safety gear in dry bag plus paddle and towing line Hull port storage bags Righting water bag 250# with block & tackle plus big cat righting lines under tramp Covers for wings, tramp, hulls and roller jib Spare parts including dagger boards Hobie manual and parts diagram Boat and trailer each have NJ titles Prime beach spot at SHBCC with winch system is available Rigging help and instruction is available eBay listing is at www.tinyurl.com/H18SXinNJ Low starting bid, with Buy It Now at $3,750
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)
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