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2021 Gunboat 68

Listed
Expired
$11,206,800 USD

Seller's Description

Tosca is Gunboat 68 number 4 launched in March 2021. Tosca is built to the highest specification of all of the existing Gunboat 68s and has been significantly optimized for both performance on the race track and refinement of systems and comfort onboard

The owner had Whitecap representation through the build to work with the yard and ensure that his exacting expectations were met and that his dream project was realized.

Additional Details

Manufacturer Provided Description

Boldly moving into the future

Fast, technologically advanced, and elegantly designed, The Gunboat 68 is the culmination of development within the fleet since the first Gunboat launched in 2002. Incorporating the best of what has come before with experienced boatbuilding and valuable industry partnerships, the Gunboat 68 is a step-change in the evolution of the brand.

Life is too short to sail a slow boat

Enter the steadfast ambition that sparked Gunboat: applying proven, Grand Prix race boat building and sailing performance technology to what is at its core, an optimized world-cruising sailing yacht. The Gunboat 68 was designed and engineered with aesthetics, performance, and utmost safety in mind for extended bluewater cruising. Lightweight, all-carbon composite construction is the foundation of this robust platform, designed to be highly capable of handling a wide variety of conditions encountered when offshore sailing, and an absolute pleasure to sail in the entire range of conditions.

Description

Rare opportunity to purchase a brand new, recently launched Gunboat 68.

Tosca is Gunboat 68 number 4 launched in March 2021. Tosca is built to the highest specification of all of the existing Gunboat 68s and has been significantly optimized for both performance on the race track and refinement of systems and comfort onboard

The owner had Whitecap representation through the build to work with the yard and ensure that his exacting expectations were met and that his dream project was realized.

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Specs

Designers
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Builders
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Associations
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# Built
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Hull
Catamaran
Keel
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Rudder
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Construction
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Dimensions

Length Overall
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Waterline Length
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Beam
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Draft
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Displacement
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Ballast
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Rig and Sails

Type
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Reported Sail Area
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Total Sail Area
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Mainsail
Sail Area
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P
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E
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Air Draft
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Foresail
Sail Area
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I
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J
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Forestay Length
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Auxilary Power

Make
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Model
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HP
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Fuel Type
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Fuel Capacity
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Engine Hours
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Accomodations

Water Capacity
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Holding Tank Capacity
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Headroom
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Cabins
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Calculations

Hull Speed
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Hull Speed

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.

Formula

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

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Classic formula: ?
Sail Area/Displacement
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Sail Area / Displacement Ratio

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.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
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<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
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Ballast / Displacement Ratio

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.

Formula

Ballast / Displacement * 100

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<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
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Displacement / Length Ratio

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
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<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
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Comfort Ratio

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
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<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
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Capsize Screening Formula

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
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<2: better suited for ocean passages
>2: better suited for coastal cruising

This listing is presented by MultihullCompany.com. Visit their website for more information or to contact the seller.

View on MultihullCompany.com

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