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For Sale: 1970 Islander 37 Pilothouse Motorsailer The Perfect PNW adventure boat, she has it all and is ready to set sail! Located in beautiful Sequim Bay at John Wayne Marina, it comes with a transferable slip with the potential for it to be a live-aboard slip at marinas discretion and approval. We purchased this boat a couple years ago with big plans for adventure and have done a lot of work to get her ready. Unfortunately life has gotten in the way and we just dont have time to explore as much as we would like. So reluctantly we are passing her on to someone who will appreciate her more than we can at the moment. Some of the work that was done: All new freshwater plumbing, new electronics, new spreaders, exhaust system, engine mounts, bottom paint, thru hulls, and prop shaft seal all done in 2022. Everything is in great working order, engine starts right up, and she drives and sails beautifully.
I know that I havent listed everything, so please feel free to message with any questions you many have.
Equipment: Dual helm stations Perkins 4-107 Marine diesel engine Transmission: Hurth velvet drive w/ Walter V-drive Brand new stainless exhaust system All new electronics and navigation: Garmin Chartplotter, radar, sail pack, and ClearVu transducer Sloop Rigged Working head with SeaLand macerating toilet, and with 15 gallon (estimated) black water holding tank. Stainless fresh water tank 75 Gallon diesel painted steel fuel tank Manual Windlass Dickinson Newport diesel heater 3 burner LP Stove/oven Both main and Jib sails are in good working condition Cockpit cushions Spare Danforth anchor 70ft of chain and 400ft of Rope. Come with an assortment of spare parts 1 Aluminum propane tank
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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