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NEW LISTING at Multihull Central Boatworks is this bold Royal Cape 50, ‘Elanah’.
A reluctant sale as it is the end of an era for two brothers who sailed with their wives to parts of Australia and nearby waters most of us only dream of. ‘Elanah’ was a regular in the Kimberley region having sailed there from SE Queensland four times!
This vessel has so much going for her, in particular her size featuring 3 king sized berths, enormous deck space with teak ‘tramps’ and her solid bones made for blue water cruising. Built in South Africa, she was certainly made to last.
Undergoing a full detail at the moment, ‘Elanah’ will be worth an inspection if you are looking for a spacious liveaboard vessel that will offer you comfort and safety.
Book now for an inspection on site or request a boat inventory. More photos coming soon.
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)
First designed for single-chined plywood construction. Based on the ZEESLANG (‘Sea Snake’ vds #58 - 1956). A fiberglass version was built to the same single-chined hull shape, from molds that were made off a plywood boat. Built, and seen mostly in South Africa. It is what would later be called an ULBD and decades ahead of it’s time. Despite the name, the RCOD was never actually raced as a one-design class.
Thanks to Dudley Dix for providing a correction.
This listing is presented by MultihullCentral.com. Visit their website for more information or to contact the seller.
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