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The Catalina 250 is a small recreational keelboat, built predominantly of fiberglass. It has a masthead sloop rig, a transom-hung rudder and a fixed fin keel, wing keel or centerboard. The fin keel version displaces 4,200 lb (1,905 kg) and carries 1,050 lb (476 kg) of ballast. The centerboard version displaces 3,250 lb (1,474 kg) and also carries 1,200 lb (544 kg) of water ballast in a separate double bottom hull tank.123
The boat has a draft of 5.00 ft (1.52 m) with the standard keel and 3.42 ft (1.04 m) with the optional shoal draft wing keel. The centreboard version has a draft of 5.75 ft (1.75 m) with the centreboard extended and 1.67 ft (0.51 m) with it retracted, allowing beaching or ground transportation on a trailer.12
The boat is normally fitted with a small outboard motor for docking and maneuvering. The fuel tank holds 6 U.S. gallons (23 L; 5.0 imp gal) and the fresh water tank has a capacity of 5 U.S. gallons (19 L; 4.2 imp gal).12
The wing keel version has a PHRF racing average handicap of 228 with a high of 237 and low of 213. The centerboard and water ballast version has a PHRF racing average handicap of 222 with a high of 228 and low of 216. All versions have a hull speed of 6.18 kn (11.45 km/h).345
Equipment: newer sails, anchors, cushions, bimini, transom seating, VHF, tools, everything you can imagine is in this boat. Galvanized dual axle trailer with mast raising system, too much to list….illness forces sale.
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)
Wing Keel draft: 3.42’/1.04m
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