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Sailboat specifications and datasheets

J/95

The J/95 is a 31’2” monohull sailboat designed by Alan Johnstone. She was built by J/Boats (United States) and made of sandwich fiberglass / polyester (composite infusion). The production started in 2009 .
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J/95's   Main Features
Model J/95
Type of hull Monohull
Category Cruiser-racer sailboat
Shipyard
Designer Alan Johnstone
Construction Hull and deck:
sandwich fiberglass / polyester (composite infusion)
First built hull 2009
Last built hull Discontinued
Appendages Centerboard :
Centerboard in the keel
Helm 1 wheel
Rudder 2 spade rudders
Cockpit Open aft cockpit
Unsinkable No
Trailerable No
Standard public price ex. VAT (indicative only) N/A
J/95's   Main dimensions
Hull length 31’ 2”
Waterline length 28’ 5”
Beam (width) 10’
Draft 5’ 6”
Draft when appendages up 3’
Light displacement 6001 lbs
Ballast weight 2449 lbs
Ballast type Lead
J/95's   Rig and sails
Upwind sail area 450 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum
Standing rigging Single-strand (ROD)
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 36’ 7”
JiFore triangle base (from mast foot to bottom of forestay) 11’
PiMainsail hoist measurement (from tack to head) 36’ 7”
EiMainsail foot measurement (from tack to clew) 13’
J/95's   Performances
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
21.44
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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.
119
Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
41 %
Hull speediAs 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.
7.14 knots
J/95's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 14 HP
Fuel type Diesel
Fuel tank capacity 14.5 gal
J/95's   Accommodation
Cabin(s) 1
Berth(s) (min/max) 2 / 4
Head(s) 1
Fresh water tank capacity 19.8 gal

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