Seller's Description
This boat is race/cruise ready. Only sailed in freshwater, exclusively stored on hydro-hoist, and in surprisingly good condition.
SAILING WORLD rated J/80 as easier to handle, less intimidating, safer and better suited for sailing offshore than other modern sport boats tested.
Thanks to its 1400lb. Fixed lead keel (48% ballast ratio) J/80 has big-boat feel and requires less experienced crew. The boom is high for safety and good visibility. No one has to clamber over a cabin top because everyone sits in the 12 ft. long cockpit.
Even toddlers are contained by playpen-high cockpit sides. Be sailing in 3 minutes. Take off the boom cover and hoist the mainsail, attached to the mast with slides. Cast off. You’re now sailing faster than other boats with full canvas. Ready for more speed? Uncleat the furler line and pull in the jib sheet. Presto! Now you’re really flying! Time for the afterburners? Pull the sprit launch control line, hoist the asymmetric spinnaker and trim. Now you’re planing! To jibe, simply let off the old sheet and pull in the new. No one on the foredeck! You can even do it single-handed. And to think, prior to the J/80, this kind of performance was rarely achieved, even with a full crew of 4-5 athletic experts.
Equipment: - Triad trailer - Electric Motor - 2 Main Sails - 2 Jib Sails - 2 Spinnakers - Sheets - Bilge Pump - Extensive instruments
Specs
- Designer
- Rod Johnstone
- Builders
- J Boats
- Waterline Systems, LLC
- Association
- J/80 Class Website
- # Built
- ?
- Hull
- Monohull
- Keel
- Fin
- Rudder
- Transom hung
- Construction
- FG
Dimensions
- Length Overall
- 25′ 11″ / 7.9 m
- Waterline Length
- 22′ 0″ / 6.7 m
- Beam
- 8′ 0″ / 2.4 m
- Draft
- 4′ 11″ / 1.5 m
- Displacement
- 2,900 lb / 1,315 kg
- Ballast
- 1,400 lb / 635 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 338′² / 31.4 m²
- Total Sail Area
- 337′² / 31.3 m²
Mainsail
- Sail Area
- 188′² / 17.4 m²
- P
- 29′ 11″ / 9.1 m
- E
- 12′ 6″ / 3.8 m
- Air Draft
- ?
Foresail
- Sail Area
- 150′² / 13.9 m²
- I
- 31′ 5″ / 9.6 m
- J
- 9′ 6″ / 2.9 m
- Forestay Length
- 32′ 10″ / 10 m
Spinnaker
- SPL/TPS
- ?
- ISP
- 33′ 0″ / 10.1 m
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- 1
Calculations
- Hull Speed
-
8.7 kn
Classic: 6.29 kn
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
-
26.6
>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
-
48.3
>40: stiffer, more powerful
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
-
121.3
100-200: light
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
-
11.5
<20: lightweight racing boat
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
-
2.3
>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
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