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Sailboat specifications and datasheets

JPK 998

The JPK 998 is a 32’8” monohull sailboat designed by Jacques Valer. She was built by JPK (France) and made of sandwich balsa / fiberglass / vinylester (composite infusion). The production started in 2008 .
JPK 998 JPK 998 sailingJPK 998 sailingJPK 998 detailJPK 998 detail
JPK 998's   Main Features
Model JPK 998
Type of hull Monohull
Category Racing sailboat
Shipyard
Designer Jacques Valer
Construction Hull and deck:
sandwich balsa / fiberglass / vinylester (composite infusion)
First built hull 2008
Last built hull Discontinued
Appendages Keel :
Fin with bulb
Helm 1 tiller
Rudder 1 transom hung rudder
Cockpit Open aft cockpit
Unsinkable No
Trailerable Yes
EC certification A
Standard public price ex. VAT (indicative only) About
99 000
(2008)
JPK 998's   Main dimensions
Hull length 32’ 8”
Waterline length 31’ 1”
Beam (width) 9’ 10”
Draft 6’ 11”
Light displacement 5952 lbs
Ballast weight 2976 lbs
Ballast type Steel fin with lead bulb
JPK 998's   Rig and sails
Upwind sail area 689 sq.ft
Downwind sail area 1539 sq.ft
Mainsail area 409 sq.ft
Genoa area 280 sq.ft
Symetric spinnaker area 1023 sq.ft
Asymetric spinnaker area 1130 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Deck stepped mast
Spars Mast in Carbon fiber and boom in Aluminum
Standing rigging Single-strand (ROD)
Number of levels of spreaders 2
JPK 998'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.
33.01
Downwind 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.
73.75
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.
90
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.
50 %
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.
7.47 knots
JPK 998's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 13 HP
Fuel type Diesel
Fuel tank capacity 19.8 gal
JPK 998's   Accommodation
Berth(s) 6
Maximum headroom 5’ 7”
JPK 998's   Fore cabin
Berth length 7’ 2”
Berth width 4’ 7”

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