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Competitive J80 #81: 2018 Great Chase Winner - 120 handicap boats in race - 1st overall.
Raced in Long Island Sound before moving her to Hull, MA in 2016
Rig tuned for speed, 3 sets of racing sails.
Triad Trailer rebuilt in 2016 (Brakes, tires, rims, lights, hitch…). Highway travel ready.
Equipment: Quantum, Doyle & UK sets of sails. Jobs have 3, 2 & 2 season each of racing. Mains have 4, 1 & 2 seasons of racing each. UK Spin used 6 times, 3 addl spins each with 3-4 years of racing.
Jib sock, Harken Roller furling, 2 main covers, tiller cover, tiller extension, winch handle, fiberglass spin pole for symmetric spin, mast base at max speed position, new head stay (2020), all Jam cleats replaced in 2017, winches rebuilt in 2017, loose gauge, LED AAA battery Running lights, manual bilge pump, dock lines, fenders, life Jackets, anchor, rigid vang…
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)
One-Design raced in the Detroit Michigan area from the 1930s thru the 1960s.
The Luedtke Brothers yard was located in Toledo, Ohio, USA.
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