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1996 Com-Pac 25 The Com-Pac 25 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a raked stem, a near-plumb transom, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel. It displaces 4,800 lb (2,177 kg) and carries 1,900 lb (862 kg) of ballast. The boat has a shoal draft of 2.50 ft (0.76 m). Under sail the boat is well balanced on all points of sail.
Equipment: Equipment Cockpit cushions Tiller steering Tiller Pilot ST1000 Perch seats Enclosed head with Port a potty (never used) Cabin top main sheeting with 4 to 1 traveler. CDI FF4 Roller Furler Guest 2 bank 15 amp Battery Charger 120 volt shore power system. Lazy Jacks Pressure cold water Rub rail Upgrades/Improvements Garmin EchoMap Plus 94sv (2019) with new Bronze Transducer New Automatic electric Bilge Pump (2019) New Neil Pryde Main with single reef point (2019) New Sunbrella UV cover for 120% Jib (2019) New Main cover (2019) New Bimini (2019) New electric bilge pump and switch. (2019) New running rigging, main sheet, main halyard, traveler lines and jib sheets (2019) Standard Horizon GX1700 Explorer GPS VHF Radio - Black (2019) New Lazy jack lines (2021)
New lead acid batteries (2) (2020) B&G Wind Sensor and Display (2020) Lewmar Ocean 16 self tailing primary winches (2020) Lewmar st14 cabin top winches Mid-Ship Cleats Recent maintenance New Motor Mounts (2019) Shaft log Sealed (2019) New Raw water pump (2019) CDI Roller Furler repair kit (2019) Manual Bilge Pump new (2021) Disclaimer The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice. PROPULSION Engine Make Westerkeke Engine Model 2 Cylinder Engine Type Inboard Drive Type Other Fuel Type Diesel SPECIFICATIONS Dimensions Length Overall 28ft Max Draft 2.42ft Beam 8.42ft Weights Dry Weight 4,800Lb
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)
The hull of the WATKINS 25 is alledged to have derived from the COLUMBIA 24 (with major modifications) including a completely different deck and coachroof. The WATKINS 25 later became the COM-PAC 25.
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