Detailed sailboat specifications and datasheets since 2015
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J/92s

Sailboat specifications

The J/92s is a 29’11” (9.12m) cruiser-racer sailboat designed by Rod Johnstone (United States). She was built since 2005 (and now discontinued) by J/Boats (United States).

J/92s's main features

Model
J/92s
Hull type
Monohull
Category
Cruiser-racer sailboat
Sailboat builder
Sailboat designer
Country
United States
Construction
GRP (glass reinforced polyester):
Sandwich fiberglass polyester
First built hull
2005
Last built hull
Discontinued
Appendages
Keel : L-shaped keel (with bulb)
Helm
Single tiller
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
EC design category
 iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5m
B
Standard public price ex. VAT (indicative only)
N/A

J/92s's main dimensions

Hull length
29’ 11”9.12 m
Waterline length
26’ 6”8.07 m
Beam (width)
10’3.05 m
Draft
6’ 2”1.9 m
Mast height from DWL
46’ 1”14.06 m
Light displacement (MLC)
5622 lb2550 kg
Ballast weight
2315 lb1050 kg
French customs tonnage
6.43 Tx

J/92s's rig and sails

Upwind sail area
619 ft²57.5 m²
Downwind sail area
1270 ft²118 m²
Mainsail area
312 ft²29 m²
Genoa area
307 ft²28.5 m²
Solent area
221 ft²20.5 m²
Stormjib area
65 ft²6 m²
Asymmetric spinnaker area
958 ft²89 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
40’ 8”12.4 m
J
 iFore triangle base (from mast foot to bottom of forestay)
11’ 6”3.5 m
P
 iMainsail hoist measurement (from tack to head)
38’ 11”11.85 m
E
 iMainsail foot measurement (from tack to clew)
13’ 11”4.25 m
Rigging type
Sloop Marconi fractional
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars
Standing rigging
Dyform

J/92s's performances

Upwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.

Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.
332 ft²/T30.81 m²/T
Downwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.
680 ft²/T63.22 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length:

a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
137
Ballast ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
41 %
Critical hull speed
 iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
6.89 knots

J/92s's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power (min./max.)
13 HP / 19 HP
Fuel type
Diesel
Fuel tank capacity
13.2 gal50 liters

J/92s's accommodations and layout

Cockpit
Open aft cockpit
Cabin(s)
1
Berth(s) (min./max.)
4 / 6
Head(s)
1
Maximum headroom
4’ 11”1.5 m
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