Columbia is well known and respected for ocean-going cruisers and live-aboards. This Columbia is no different featuring a solid construction model, well-thought-out and appointed for passages and adventures. If you are ready, this boat will take you.
A dependable recently serviced Perkins 50 hp diesel is onboard to get you in and out of port safely, and when the wind isn’t present, to motor you onward to the destination. You can sail under the included inventory of 3 main sails, 2 jibs, 1 storm sail
Electronics include B and G Vulcan 9 with C-Map, VHF, B and G Forward Scan, Airmar PM150, CPT Auto Pilot. An open-design salon and galley w/24x72” fridge w/cooler bottom door will keep all on board fed and comfortable when dining or relaxing after the long cruise. The forward and aft staterooms provide privacy and comfort with attached heads and stand-up showers. Take a look and get ready for adventure, Columbia 45 is ready for duty.
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 √LWLA 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)
Raised deck motor sailer was available in full keel and shoal draft versions. A ketch rig was also available.
Same hull as the COLUMBIA 43.
From builders original brochure.
Shoal Draft: 5.25’
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