Seller's Description
Windrider 16, 1999 Kentucky $900
Fun, Jim Brown designed, roto-molded trimaran.
Easy to set up and sail. Fast with one but can hold three. Ride dry in the hull, controlling the rudder with pedals or ride the trampolines and use the tiller extension.
Includes galvanized trailer, spare wheel, motor mount, anchor, kayak skirt, certificates of origin and titles for the vessel and trailer. Condition: pretty good for 1999 model. Has spent most of its life under a tarp. Sail has a little staining, plastic above port outrigger socket had a one inch crack that was repaired by heat fusion. Teflon mast heel was recently replaced. Needs one batten and a clip for one of the tiller extensions needs to be replaced. Harken blocks and cleats in good condition. 2nd owner doesn’t want to watch it slowly fade away in the back yard. Taking it out a twice a year is fun but it would be nice to know someone else is getting to enjoy it.
LOA 16’1” LWL 15’8” Beam 12’7” Weight 250 lbs. Sail Area 93 sq. ft. Draft 16” Capacity 500 lbs or phone 502-594-3705
Specs
- Designer
- Jim Brown/Windrider
- Builder
- Windrider Sailing Trimarans
- Associations
- ?
- # Built
- ?
- Hull
- Monohull
- Keel
- ?
- Rudder
- ?
- Construction
- Roto molded Poly.
Dimensions
- Length Overall
- 16′ 0″ / 4.9 m
- Waterline Length
- ?
- Beam
- 12′ 0″ / 3.7 m
- Draft
- 1′ 6″ / 0.5 m
- Displacement
- 250 lb / 113 kg
- Ballast
- ?
Rig and Sails
- Type
- Cat
- Reported Sail Area
- 93′² / 8.6 m²
- Total Sail Area
- ?
Mainsail
- Sail Area
- ?
- P
- ?
- E
- ?
- Air Draft
- ?
Foresail
- Sail Area
- ?
- I
- ?
- J
- ?
- Forestay Length
- ?
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
- ?
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
- Sail Area/Displacement
-
37.6
>20: high performance
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.
- Ballast/Displacement
- ?
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
- Displacement/Length
- ?
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
- Comfort Ratio
- ?
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
- Capsize Screening
-
7.6
>2.0: better suited for coastal cruising
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
Notes
Trimaran w/fixed keel.
Carbon spar.
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