The J/95 is a 31’2” (9.51m) cruiser-racer sailboat designed by Alan Johnstone (United States). She was built since 2009 (and now discontinued) by J/Boats (United States).
J/95's main features
GRP (glass reinforced polyester):
Sandwich fiberglass polyester (vacuum infusion)
First built hull
Last built hull
Centerboard : pivoting centerboard in the keel
Single helm wheel
Twin spade rudders
Standard public price ex. VAT (indicative only)
J/95's main dimensions
31’ 2”9.51 m
28’ 5”8.66 m
5’ 6”1.68 m
Draft when appendages up
Light displacement (MLC)
6001 lb2722 kg
2449 lb1111 kg
J/95's rig and sails
Upwind sail area
450 ft²41.8 m²
I iFore triangle height (from mast foot to fore stay top attachment)
36’ 7”11.16 m
J iFore triangle base (from mast foot to bottom of forestay)
P iMainsail hoist measurement (from tack to head)
36’ 7”11.16 m
E iMainsail foot measurement (from tack to clew)
Sloop Marconi 9/10
Keel stepped mast
Number of levels of spreaders
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.
231 ft²/T21.44 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.
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.
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.
J/95's auxiliary engine
1 inboard engine
Fuel tank capacity
14.5 gal55 liters
J/95's accommodations and layout
Open aft cockpit
2 / 4
Freshwater tank capacity
19.8 gal75 liters
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