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1989 Island Packet 27
Excellent Conditon.
Equipment: SAILS:
Main in Good condition. 2 reef points Genoa in Good condition 2 extra head sails in Good-Very Good condition
ELECTRONICS:
Shore power inlet. Garmin GPmap 545 (GPS). VHF AM/FM CD (Kenwood). DC Phone Charging Receptacles added (2). Electronic Battery Monitor.
INSIDE EQUIPMENT:
(2) Electric Bilge Pumps. Pro Mariner 12 AMP Dual Bank Marine Battery Charger. Portable Solar Battery Charger. All cabin seat cushions replaced by my wife and I about 6 years ago. All DC cabin light bulbs changed to LEDs. Mosquito netting for hatchs and main entry.
OUTSIDE EQUIPMENT:
Cockpit seat cushions. Swim Ladder & Cockpit helm folding table. ALL exterior NEWLY (5/22) coated with Semco Teak Sealer. Looks amazing! Roller Furler for Genoa. Yanmar 2GM20F, 18 h.p. Diesel with 965 hours. Battery Isolator added. Engine access hatch in quarter berth added for increased engine accessibility. New Engine driven fuel pump. (Approx 75 hours ago). Transmission Fluid replaced (Approx 85 hours ago). Dutchman Sail Flaking system. Foredeck light bulb changed to LED. Cockpit shower. Cockpit Manual Bilge Pump. Bottom Paint Nov 2019. Bottom on a scheduled cleaning cycle.
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)
Centerboard Model - draft: BU-2.67’/.81m; BD-6.0’/1.83m.
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