windrush 12 catamaran

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Windrush 12

By Curious about cats , December 3, 2005 in Australian Catamaran Forum

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Curious about cats.

Im new to sailing and ive been looking around at different cats. I was wondering if anyone has ever heard of the windrush 12? ive seen the 14ft version but never heard of the 12 before today.

i will generally be sailing solo and im a lightweight, bout 60kg, so i was thinking maybe a 12ft version would b a bit more managable? any ideas most appreciated.

cheers, curious.

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Hi Curious,

Yes, they were produced back in the 70's by the original Windrush Co., AKA Surfcat. My advice is to get the larger 4.3 [14'] model as there are plenty around, lot of advice availale, parts are still made and are probably easier to sail because they nose dive less due to the extra 600mm.

Hi, Inland sailor,

Thanks for your advice. I suppose the availability of parts would become an issue. Like you said better to stick to something which is a little more common. Ill keep looking.

Cheers, Curious.

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8 Blamey Place O'Connor WA 6163 Australia Phone: 08 9314 1317 Fax: 08 9331 3255

Windrush Yachts specialises in yachts (sail or motor), catamarans and motor sport composites. Windrush works in all facets of composite construction including defence, mining, industrial and recreation applications. We have built a reputation for excellence in design and construction since starting out in the early 1970’s. Some of our in house designed products such as the Windrush 14 (Trac 14) can be found across the globe. We continue to push the boundaries of what is perceived to be possible with sail boats and construction techniques.

Windrush Yachts

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• Sailboat Guide

Windrush 14

Windrush 14 is a 14 ′ 0 ″ / 4.3 m catamaran sailboat designed by Richard and Jay McFarlane and built by Windrush Yachts starting in 1976.

Rig and Sails

Auxilary power, accomodations, calculations.

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

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

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.

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.

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.

Ballast / Displacement * 100

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.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

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.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

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.

CSV = Beam ÷ ³√(D / 64)

First known as the SURFCAT in Australia. Several versions have been built over the years. Cat and Sloop versions were available. Later produced in the US under license by AMF as the TRAC-14. Still in production: (2010)

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Feig electronic partners with isbc group to deploy ucode dna rfid security and parking access control solution in moscow business district.

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