Seller's Description
1985 Nacra 5.7 1985 Nacra 5.7 with trailer, beach wheels, and cover. -New in 2021, Standing rigging, trapeze, diamonds, and SLO trampoline, and so many more little pieces I’m forgetting I’m sure. -Harken 8:1 mainsheet -Original jib, and Tornado main cut to fit luff. -Laminate N5.5 main sail(excellent condition), and brand new Whirlwind jib. -Delrin cross beam end caps. -Custom EVA & hydro turf seats. -Keels have been redone with epoxy(color wasn’t perfect to begin with, and it’s yellowed some, but they’re solid! -Beach wheels -cover (has some water stains, but stitching/cover is solid!) Galvanized trailer with 2018 tires, and LED lights. The good is it has a ton of new parts, and everything works great! Steering is tight, sails fantastic. The bad is she’s got some cosmetic issues. Gel coat cracking these are known for, and front decks are pretty rough. Have more pics, and even a few videos. Trailer has a title. Boat is registered in my Name in Kansas. Bill of sale.
Specs
- Designer
- NACRA Design Group
- Associations
- ?
- # Built
- ?
- Hull
- Catamaran
- Keel
- None
- Rudder
- ?
- Construction
- FG
Dimensions
- Length Overall
- 18′ 6″ / 5.6 m
- Waterline Length
- ?
- Beam
- 8′ 0″ / 2.4 m
- Draft
- 1′ 6″ / 0.5 m
- Displacement
- 360 lb / 163 kg
- Ballast
- ?
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 230′² / 21.4 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
-
72.8
>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
-
4.5
>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
Spin. Area 21 m2.
Twin trapeze.
Originally called NACRA 5.7.
Available in ‘FUN’, ‘SCHOOL’, and ‘SPORT’ versions.
This listing is presented by TheBeachCats.com. Visit their website for more information or to contact the seller.
