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1984 MacGregor 25 sailboat, original trailer, Newer main, jib and genoa sails, original cushions in decent shape. Awesome pop-top with canvas cover and plastic windows. New battery for bilge pump (new), running lights (LED), and interior lights. New trailer lights. 2.5 HP Mercury 4-stroke outboard motor, plenty strong for this boat. All ropes and hardware, ready to sail. Anchor, fenders, PFDs. Unused cabin space for porta-potty (not included) or storage or expansion. Lots of tread on the tires. Note small dents in mast cosmetic only. Keel cable and mounting is in excellent shape. 2” hitch. I bought this recently and fixed it up, but decided it is too big for our use. For more details see https://sailboatdata.com/sailboat/macgregor-25. I’m at 8to8 fiv three 911 to nine. Thanks!
Equipment: Trailer, Main / Jib / Genoa sails, Mercury 4-stroke engine, cushions, pop-top with canvas cover and plastic windows, battery, bilge pump, running lights, interior lights, ropes and hardware, anchor, fenders, PFDs.
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 first version was called the VENTURE 25. With relatively few changes, it became the MACGREGOR 25 (around 1980). With more than 7000 boats sold, it’s one of the most popular models from this builder.
Masthead Rig:
I: 28.3’
J: 9.75’
P: 24.5’
E: 10.5’
Photo of Venture 25 courtesy Adam Hunt.
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