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Wun-Len has been well maintained and kept in good condition, with many upgrades. She has been used for day sailing and cruising on Lake Michigan.
Universal Diesel Engine - Model 5411 - 11hp - 5 knots cruising speed - 5 knots max speed
Tankage - Fuel: 15 gallons - Water: 13 gallons - Holding: 21 gallons
Equipment: - Line/Cam Lock Backstay Adjuster - Boom Vang - Hood Roller Furling - Custom Garhauer Mainsheet Traveler - 4 Lewmar 2 Speed Self Tailing Winches Wire to Line - Headsail Halyards Mainsails - were replaced about 15 years ago - Genoas - came with boat - Storm Jibs Available - All sails are taken to UK Sailmakers at the end of each season for washing and repairs as needed.
V-Berth Boat is stripped out, including all cushions, electronics, books & charts - before putting into winter storage every year
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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