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Very clean and well cared for Bristol 31.1 sloop. Newer sails, strong track system for ease of hoisting the mainsail and Harken roller furling for the 110% genoa, plus a spinnaker (never used) and 130 genoa. Newer canvas covers for sails, dodger, bimini with connector, winch covers for Lewmar self-tailing winches and covers for hatches. Lots of extra canvas bags and cockpit curtains. Cockpit cushions. Upgraded 24 hp Universal diesel with approximately 1200 hours, runs very well. Spartan seacocks. Two anchors, one with all chain, the other with 20’ chain and 200’ rode. Manual windlass. Adler Barber refrigerator, three burner propane stove and oven, hot and cold pressure water with large capacity water tank. Enclosed head with holding tank. 200 watts solar power with regulator keeps all systems charged. VHF, newer Garmin; chartplotter, GPS, Radar, and Raymarine; wind point, wind speed, depth sounder, knotmeter. Autohelm autopilot, wheel and Ritchie compass. Beautiful interior joinery and cushions in excellent conditions. A comfortable live-aboard for extended sailing. Lots of spares. I have owned this boat for 15 years. Currently in Rockland, ME.
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)
Keel/CB verson:
Draft: BD: 7.0’ BU: 3.5’
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