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Sailboat specifications and datasheets

Kelt 9m keel and centerboard

The Kelt 9m, here in "keel and centerboard" version, is a 29’6” monohull sailboat designed by Philippe Briand. She was built by Kelt (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1981 and 1985 with about 100 hulls completed.

The Kelt 9m is as well listed, on Boat-Specs.com, in version Fin keel.

Kelt 9m Kelt 9m sailplanKelt 9m layout
Kelt 9m's   Main Features
Model Kelt 9m
Version Keel and centerboard
Type of hull Monohull
Shipyard
Designer Philippe Briand
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich fiberglass / polyester
First built hull 1981
Last built hull 1985
Number of hulls built About 100
Appendages Centerboard :
Centerboard in the keel
Helm 1 tiller
Rudder 1 spade rudder
Unsinkable No
Trailerable No
French navigation category 2
Standard public price ex. VAT (indicative only) N/A
Kelt 9m's   Main dimensions
Length overall 29’ 8”
Hull length 29’ 6”
Waterline length 24’ 4”
Beam (width) 10’
Waterline beam (width) 7’ 8”
Draft 6’ 2”
Draft when appendages up 3’ 2”
Mast height from DWL 41’ 8”
Fore freeboard 3’ 7”
Mid-ship freeboard 3’ 4”
Light displacement 5688 lbs
Maximum displacement 7198 lbs
Ballast weight 2778 lbs
Ballast type Cast iron exterior ballast with steel centerboard
Kelt 9m's   Rig and sails
Upwind sail area 535 sq.ft
Downwind sail area 930 sq.ft
Mainsail area 198 sq.ft
Genoa area 336 sq.ft
Symetric spinnaker area 732 sq.ft
Rigging type Sloop Marconi masthead
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 0 °
IiFore triangle height (from mast foot to fore stay attachment) 40’ 5”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 6”
PiMainsail hoist measurement (from tack to head) 34’ 11”
EiMainsail foot measurement (from tack to clew) 10’ 10”
Kelt 9m's   Performances
HN (French rating) 14.0
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.
26.40
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.
45.94
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.
49 %
Wetted surface 197 sq.ft
Righting moment @ 1°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
359 lbs.ft
Maximum transverse section 8 sq.ft
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.
6.60 knots
Kelt 9m's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 18 HP
Fuel type Diesel
Fuel tank capacity 6.6 gal
Kelt 9m's   Accommodation
Cabin(s) 2
Berth(s) 6
Head(s) 1
Fresh water tank capacity 31.7 gal
Fridge/ice-box capacity 17.2 gal
Maximum headroom 6’ 4”
Galley headroom 6’ 1”
Head headroom 5’ 10”
Kelt 9m's   Saloon
Maximum headroom 6’ 1”
Saloon table length 4’
Saloon table width 2’ 2”
Berth length 6’ 4”
Berth width 2’
Kelt 9m's   Fore cabin
Maximum headroom 5’ 2”
Berth length 6’ 2”
Berth width 4’ 2”
Kelt 9m's   Aft cabin
Maximum headroom 5’ 10”
Berth length 6’ 4”
Berth width 4’ 2”

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