Detailed sailboat specifications and datasheets since 2015
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Sealord 39 Sloop

Sailboat specifications

The Sealord 39 is a 38’6” (11.73m) cruising sailboat designed by Dubois Naval Architects (United Kingdom). She was built between 1983 and 1987 by Westerly (United Kingdom) with 42 hulls completed. The Sloop version is offered with a classic masthead Marconi sloop rig.

The Sealord 39 is as well listed, on Boat-Specs.com, in Ketch version (see all the versions compared).

Sealord 39's main features

Model
Sealord 39
Version
Sloop
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Sailboat designer
Country
United Kingdom
Construction
Hull and deck: GRP (glass reinforced polyester)
Number of hulls built
42
First built hull
1983
Last built hull
1987
Appendages
Keel : fin without bulb
Helm
Single helm wheel
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
Standard public price ex. VAT (indicative only)
N/A

Sealord 39's main dimensions

Hull length
38’ 6”11.73 m
Waterline length
32’ 6”9.9 m
Beam (width)
13’ 2”4.01 m
Draft
5’ 6”1.68 m
Mast height from DWL
50’ 4”15.32 m
Light displacement (MLC)
18501 lb8392 kg
Ballast weight
8001 lb3629 kg

Sealord 39's rig and sails

Upwind sail area
967 ft²89.83 m²
Downwind sail area
1828 ft²169.82 m²
Mainsail area
352 ft²32.7 m²
Genoa area
615 ft²57.13 m²
Solent area
352 ft²32.7 m²
Jib area
217 ft²20.16 m²
Stormjib area
125 ft²11.6 m²
Symmetric spinnaker area
1476 ft²137.12 m²
Gennaker area
1071 ft²99.5 m²
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

Sealord 39'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.
234 ft²/T21.75 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.
443 ft²/T41.12 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.
245
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.
43 %
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.
7.64 knots

Sealord 39's auxiliary engine

Engine(s)
1 inboard engine
Fuel type
Diesel
Fuel tank capacity
53.4 gal202 liters

Sealord 39's accommodations and layout

Cockpit
Center cockpit
Cabin(s)
2
Berth(s) (min./max.)
6 / 8
Head(s)
2
Freshwater tank capacity
130.8 gal495 liters
Have you spotted incorrect data?  You can report it in the forum or contact the webmaster

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First built hull
Hull length
Oyster Heritage 37 (Oyster)
1984
37’11.28 m
Sealord 39 Ketch (Westerly)
1983
38’ 6”11.73 m
Catalina 380 Tall rig (Catalina Yachts)
1987
38’ 6”11.75 m
Catalina 390 Tall rig (Catalina Yachts)
2001
38’ 8”11.79 m
Catalina 36 MkI Tall rig (Catalina Yachts)
1982
36’ 4”11.07 m
Catalina 36 MkII Tall rig (Catalina Yachts)
1994
36’ 4”11.07 m
Moody 36 - Primrose (Moody)
1977
36’10.97 m
Idylle 13.50 (Bénéteau)
1984
42’ 4”12.9 m
Hunter 40 Shoal draft (Marlow Hunter)
1984
39’ 7”12.08 m
First 375 Shoal draft (Bénéteau)
1985
37’11.27 m
Hunter 380 Deep draft (Marlow Hunter)
1999
37’ 1”11.3 m
Océanis 390 Fin keel (Bénéteau)
1987
37’ 2”11.34 m
Gin Fizz (Jeanneau)
1974
37’ 5”11.4 m
Sun Fizz Fin keel (Jeanneau)
1980
38’ 6”11.75 m
Sharki (Amel)
1979
39’ 2”11.95 m
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