Detailed sailboat specifications and datasheets since 2015
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Kelt 6.20 Fin keel

Sailboat specifications

The Kelt 6.20 is a 20’4” (6.2m) cruising sailboat designed by Philippe Harlé (France). She was built between 1974 and 1984 by Kelt (France). The Fin keel version adopts a classical fin configuration, the easiest option to provide a low center of gravity.

Kelt 6.20's main features

Model
Kelt 6.20
Version
Fin keel
Hull type
Monohull
Category
Coastal cruising sailboat
Sailboat builder
Sailboat designer
Country
France
Construction
GRP (glass reinforced polyester):
Single skin fiberglass polyester
Number of hulls built
About 1300
First built hull
1974
Last built hull
1984
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single transom hung rudder
Unsinkable
No
Trailerable
Yes
Former French navigation category
3
Standard public price ex. VAT (indicative only)
N/A

Kelt 6.20's main dimensions

Overall length
23’ 1”7.05 m
Hull length
20’ 4”6.2 m
Waterline length
17’ 1”5.2 m
Beam (width)
8’ 1”2.48 m
Draft
3’ 6”1.06 m
Mast height from DWL
28’ 8”8.75 m
Light displacement (MLC)
2260 lb1025 kg
Ballast weight
772 lb350 kg
Ballast type
Cast iron
French customs tonnage
2.95 Tx

Kelt 6.20's rig and sails

Upwind sail area
255 ft²23.7 m²
Downwind sail area
445 ft²41.3 m²
Mainsail area
95 ft²8.8 m²
Genoa area
160 ft²14.9 m²
Solent area
114 ft²10.6 m²
Jib area
93 ft²8.6 m²
Stormjib area
30 ft²2.8 m²
Symmetric spinnaker area
350 ft²32.5 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
24’ 2”7.38 m
J
 iFore triangle base (from mast foot to bottom of forestay)
8’ 6”2.6 m
P
 iMainsail hoist measurement (from tack to head)
21’ 4”6.5 m
E
 iMainsail foot measurement (from tack to clew)
7’ 11”2.4 m
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
0 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Kelt 6.20's performances

Upwind sail area to displacement
 iThe 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 25 it indicates a fast sailboat.
251 ft²/T23.31 m²/T
Downwind sail area to displacement
 iThe 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.
437 ft²/T40.63 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The 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 ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
34 %
Critical hull speed
 iAs 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 auxiliary engine

Engine(s)
1 outboard engine

Kelt 6.20's accommodations and layout

Cockpit
Closed aft cockpit
Berth(s)
4
Maximum headroom
4’ 8”1.42 m

Kelt 6.20's saloon

Maximum headroom
4’ 4”1.3 m
Saloon table length
2’ 6”0.77 m
Saloon table width
1’ 10”0.55 m
Berth length
6’ 6”1.97 m
Berth width (head/elbows/knees/feet)
1’ 7”0.5 m / 1’ 7”0.5 m / 1’ 7”0.5 m / 1’ 7”0.5 m

Kelt 6.20's fore cabin

Maximum headroom
3’ 10”1.17 m
Berth length
5’ 11”1.8 m
Berth width (head/elbows/knees/feet)
5’ 2”1.57 m / 3’ 8”1.13 m / 2’ 4”0.69 m / 0’ 10”0.25 m
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