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Sailboat specifications and datasheets

First 30 JK standard

The First 30 JK, here in "standard" version, is a 31’2” monohull sailboat designed by Juan Kouyoumdjian. She was built by Bénéteau (France) and made of GRP (glass reinforced polyester). This sailboat was produced between 2010 and 2015.

The First 30 JK belongs to the First range. The First 30 JK is as well listed, on Boat-Specs.com, in version Shoal draft.

Bénéteau First 30 JK Bénéteau First 30 JK sailplanBénéteau First 30 JK layoutBénéteau First 30 JK sailingBénéteau First 30 JK sailingBénéteau First 30 JK accommodationsBénéteau First 30 JK accommodationsBénéteau First 30 JK detail
First 30 JK's   Main Features
Model First 30 JK
Version Standard
Type of hull Monohull
Category Cruiser-racer sailboat
Shipyard
Designer Juan Kouyoumdjian
Range First
Construction GRP (glass reinforced polyester)
First built hull 2010
Last built hull 2015
Appendages Keel :
Fin with bulb
Helm 1 tiller (helm wheel in option)
Rudder 2 transom hung rudders
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
EC certification B
Standard public price ex. VAT (indicative only) N/A
First 30 JK's   Main dimensions
Length overall 32’ 2”
Hull length 31’ 2”
Waterline length 27’ 6”
Beam (width) 10’ 7”
Draft 6’ 2”
Mast height from DWL 50’
Light displacement 8267 lbs
Ballast weight 2403 lbs
Ballast type Cast iron
First 30 JK's   Rig and sails
Upwind sail area 677 sq.ft
Downwind sail area 1304 sq.ft
Mainsail area 367 sq.ft
Genoa area 310 sq.ft
Symetric spinnaker area 936 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum (carbon fiber as an option)
Standing rigging 1x19 strand wire
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 41’ 8”
JiFore triangle base (from mast foot to bottom of forestay) 13’ 8”
PiMainsail hoist measurement (from tack to head) 40’ 5”
EiMainsail foot measurement (from tack to clew) 14’ 5”
First 30 JK'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.
26.06
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.
50.18
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.
180
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.
29 %
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.
7.03 knots
First 30 JK's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 20 HP
Fuel type Diesel
Fuel tank capacity 7.9 gal
First 30 JK's   Accommodation
Cabin(s) 2
Berth(s) (min/max) 4 / 6
Head(s) 1
Fresh water tank capacity 42.3 gal
Maximum headroom 6’ 1”

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