Seller's Description
This is a very nice J30. Hull #408 of 554 produced, she has spent her whole life on a 10-mile stretch of the St. Johns River in Northeast Florida. She has been lift kept since new and her hull and top deck look brand new.
Her sail inventory includes her main, a genoa, a jib, and a spinnaker - all in very nice condition.
All running rigging is less than two years old and is cleanly run for single-handed sailing.
In the spacious cockpit, you have tiller steering, dual compasses, and depth and speed electronics.
Below the cabin is light and airy and all cabinetry and upholstery are in very nice condition. Since the current owner has only used the boat as a day-sailer the cabin is devoid of the usual “clutter” found on a boat that is being lived on - even periodically.
Coming down the ladder you have a small galley with stainless steel sink (pictured dehumidifier not included) and two-burner cooktop to port.
To starboard refrigerator/freezer, a nav station, AC and DC panels, and a VHF radio.
Aft is large quarter-berths both port and starboard.
Forward is the salon with large settees both port and starboard and a folding pedestal table.
Moving forward is a head/shower and V-berth.
Auxiliary power is provided by a 13 HP Yanmar 2GM diesel.
If you are looking for a clean, simple day-sailer or a great boat for short stay-overs do not miss this super clean 1982 J Boat J30. This one will not last long.
Specs
- Designer
- Rod Johnstone
- Builder
- J Boats
- Association
- J/30 Class Association
- # Built
- 554
- Hull
- Monohull
- Keel
- Fin
- Rudder
- Transom hung
- Construction
- FG
Dimensions
- Length Overall
- 29′ 9″ / 9.1 m
- Waterline Length
- 25′ 0″ / 7.6 m
- Beam
- 11′ 2″ / 3.4 m
- Draft
- 5′ 2″ / 1.6 m
- Displacement
- 7,000 lb / 3,175 kg
- Ballast
- 2,100 lb / 953 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 444′² / 41.3 m²
- Total Sail Area
- 444′² / 41.2 m²
Mainsail
- Sail Area
- 247′² / 23 m²
- P
- 37′ 11″ / 11.6 m
- E
- 12′ 11″ / 4 m
- Air Draft
- ?
Foresail
- Sail Area
- 197′² / 18.3 m²
- I
- 34′ 2″ / 10.4 m
- J
- 11′ 6″ / 3.5 m
- Forestay Length
- 36′ 0″ / 11 m
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- 15
- Fuel Type
- Diesel
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
-
8.0 kn
Classic: 6.7 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
-
19.4
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
-
30.0
<40: less stiff, less 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
-
200.0
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
-
16.3
<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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