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Sailboat specifications and datasheets

J/22

The J/22 is a 22’6” monohull sailboat designed by Rod Johnstone. She was built by J/Boats (United States) and made of sandwich fiberglass / polyester. The production started in 1983 with about 1600 hulls completed.
J/Boats J/22 J/Boats J/22 layoutJ/Boats J/22 layoutJ/Boats J/22 layoutJ/Boats J/22 sailingJ/Boats J/22 sailingJ/Boats J/22 sailingJ/Boats J/22 sailingJ/Boats J/22 sailingJ/Boats J/22 sailingJ/Boats J/22 accommodations
J/22's   Main Features
Model J/22
Type of hull Monohull
Category Sport keel boat
Shipyard
Designer Rod Johnstone
Construction Hull and deck:
sandwich fiberglass / polyester
First built hull 1983
Last built hull Discontinued
Number of hulls built About 1600
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 transom hung rudder
Cockpit Closed aft cockpit
Unsinkable No
Trailerable Yes
Standard public price ex. VAT (indicative only) N/A
J/22's   Main dimensions
Hull length 22’ 6”
Waterline length 19’
Beam (width) 8’
Draft 3’ 10”
Light displacement 1764 lbs
Ballast weight 661 lbs
Ballast type Lead
J/22's   Rig and sails
Upwind sail area 223 sq.ft
Rigging type Sloop Marconi fractional
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 24’ 10”
JiFore triangle base (from mast foot to bottom of forestay) 8’ 10”
PiMainsail hoist measurement (from tack to head) 26’ 1”
EiMainsail foot measurement (from tack to clew) 9’
J/22's   Performances
Crew < 275kg (605lbs)
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.
24.04
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.
117
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.
38 %
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.
5.84 knots
J/22's   Auxiliary engine
Engine(s) 1
Engine type Outboard engine
J/22's   Accommodation
Berth(s) (min/max) 2 / 4

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