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Due to an unseen circumstance I have to sell USA 414. Great boat that has been brought back to racing condition since my purchase of the boat. Has pretty much brand new quantum 3di main and jib used one event. New running rigging and new top and bottom covers.
Equipment: Spinnaker heavy wind sheets 6/2019 Cunningham 6/2019 Spinnaker light wind sheets 12/2019 Jib furler line 12/2019 Spinnaker halyard 10/2019 Top mast up cover 10/2019 Bottom cover 10/2019 Boom cover 11/2019 Mast cover 10/2019 Jib sock 12/2019 Respray keel and rudder once painted wet sanded from 400 grit to 2000 10/2019 3di Quantum jib 12/2019 3di Quantum main 12/2019 Carbon fiber spreaders 12/2019 Thur-hull 12/2019 Added harken traveler bracket 12/2019 Raptor soft deck unknown age but in great condition and is a game changer to have. Sail22 backstay 2017-18
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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