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Heavy Displacement Center Cockpit Cruising Ketch Designed by Philip Rhodes Built by Kingsley Engineering Shipyard (Hong Kong) 1.5 inch thick TEAK hull & deck Yacal frames. Bronze knees Fastened with 4 in silicon bronze screws Heavy ground tackle, rode, chain, 4 anchors, 2 spd windlass H & C presure water Head with Groco toilet, shower, sink and teak grate. 3 cabins. 7 ft headroom in main cabin Separate crew quarters with sink and head (sleeps 2) bronze opening ports. Nice joinerwork and LOADS of stowage. Sitka spruce masts Wheel steering with auto pilot Boat recently hauled,new bottom paint, top sides painted, as well as cabin tops and varnish. 4 cyl 62 hp Diesel with Capitol reverse gear.
Equipment: Windlass-2 spd 4 anchors, chain & rode engine driven cold plate for freezer/refer Engine driven hot water Battery charger/inverter Cruisaire AC & heat Screens and custom wind scoop Davits & dinghy gas & charcoal barbques 3 burner Shipmate gimballed stainless stove and oven Many, many spares This boat is a real yacht and not a light weight toy. Designed to circum navigate.Documented for recreation and Registry (charter and trade in American Pacific protectorates)
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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©2023 Sea Time Tech, LLC
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.