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“Quality, Custom-Builds & Lightweight, this is McConaghy.” McConaghy is proud to now introduce an entire line of Cruising Multihulls. Drawing on their 50 years of yacht building excellence, and reputation for creating some of the worlds best performing race boats.
McConaghy is continual innovation and investment in new materials and technologies, has allowed the builder to firmly establish their position at the forefront of progressive high-performance and now also luxurious yacht building.
MC68 Brochure 10th May 2022 DIGITAL.pdf
The MC68 benefits from a carefully considered use of carbon that sees her precise hull forms achieve an optimum strength to weight ratio. Under full sail, in a medium breeze, the MC68 points upwind with confidence, performing like a monohull. The MC86 features a dual helm position on the flybridge, allowing for the greatest sight lines forward as well as an elevated position that aids more difficult in-port maneuvers.
The interior takes on a particularly apartment-like feel with a more architectural personality. The sophisticated environment offers a fantastic visual connect with the sea. Great care has been taken to incorporate all interior essentials and amenities in the most aesthetic and functional way possible.
For more information contact Erik Mayol at Denison Yachting. 954-763-3971
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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