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Catalina 25, 1980 sailboat for sale 2009 nissan 9.8 four stroke outboard runs good Freshwater boat clean and well cared for Trailer has four brand new tires led lites and surge brakes all working order Keel pivet pin pin and pivit bushings and lifting cable replaced in 2011 Replaced halyards sheaves and line in 2011 New mast step plate with blocks and clutches they lead back to cockpit in 2011 2019 new mast up mast stepper 2012 new outboard motor bracket from Catalina direct 2019 replaced through hull fittings from Catalina direct Nicro solar vent fan,suunto compass Original head works fine , uniden vhf radio, shore power with cord, two deep cycle batteries two years old Sails 2019 ullman full batten main , 2011 150 north roller furling jib,2011 cdi flexible furler. Original sails are old but in reasonable condition. Turnbuckles are open body ones ,two Danforth anchors with 100 ft of line, six bumpers and a depth finder
Email Jerryat jerrym26@juno.com
or phone 218-260-zero seven seven seven
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)
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