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Sailboat specifications and datasheets

Kelt 6.20 fin keel

The Kelt 6.20, here in "fin keel" version, is a 20’4” monohull sailboat designed by Philippe Harlé. She was built by Kelt (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1974 and 1984 with about 1300 hulls completed.
Kelt 6.20 Kelt 6.20 sailplanKelt 6.20 layoutKelt 6.20 accommodations
Kelt 6.20's   Main Features
Model Kelt 6.20
Version Fin keel
Type of hull Monohull
Shipyard
Designer Philippe Harlé
Construction Hull and deck:
monolithic fiberglass / polyester
First built hull 1974
Last built hull 1984
Number of hulls built About 1300
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 transom hung rudder
Unsinkable No
Trailerable Yes
French navigation category 3
Standard public price (indicative only) N/A
Kelt 6.20's   Main dimensions
Length overall 23’ 1”
Hull length 20’ 4”
Waterline length 17’ 1”
Beam (width) 8’ 1”
Draft 3’ 6”
Mast height from DWL 28’ 8”
Light displacement 2260 lbs
Ballast weight 772 lbs
Ballast type Cast iron
French customs tonnage 2.95 Tx
Kelt 6.20's   Rig and sails
Upwind sail area 255 sq.ft
Downwind sail area 445 sq.ft
Mainsail area 95 sq.ft
Genoa area 160 sq.ft
Solent area 114 sq.ft
Jib area 93 sq.ft
Stormjib area 30 sq.ft
Symetric spinnaker area 350 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) 24’ 2”
JiFore triangle base (from mast foot to bottom of forestay) 8’ 6”
PiMainsail hoist measurement (from tack to head) 21’ 4”
EiMainsail foot measurement (from tack to clew) 7’ 11”
Kelt 6.20'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.
23.31
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.
40.63
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.
206
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.
34 %
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.
5.53 knots
Kelt 6.20's   Accommodation
Berth(s) 4
Maximum headroom 4’ 8”
Kelt 6.20's   Saloon
Maximum headroom 4’ 4”
Saloon table length 2’ 6”
Saloon table width 1’ 10”
Berth length 6’ 6”
Berth width (head/elbows/knees/feet) 1’ 7”
Kelt 6.20's   Fore cabin
Maximum headroom 3’ 10”
Berth length 5’ 11”
Berth width (head/elbows/knees/feet) 5’ 2”
3’ 8”
2’ 4”
0’ 10”

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