Sealord 39 (Sloop)

Main features	Sealord 39 Sloop
Model	Sealord 39
Version	Sloop
Hull type	Monohull
Category	Offshore cruising sailboat
Sailboat builder	Westerly
Sailboat designer	Dubois Naval Architects
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

Main dimensions	Sealord 39 Sloop
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 D_WL	50’ 4”15.32 m
Light displacement (M_LC)	18501 lb8392 kg
Ballast weight	8001 lb3629 kg

Rig and sails	Sealord 39 Sloop
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

Performances	Sealord 39 Sloop
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

Auxiliary engine	Sealord 39 Sloop
Engine(s)	1 inboard engine
Fuel type	Diesel
Fuel tank capacity	53.4 gal202 liters

Accommodations and layout	Sealord 39 Sloop
Cockpit	Center cockpit
Cabin(s)	2
Berth(s) (min./max.)	6 / 8
Head(s)	2
Freshwater tank capacity	130.8 gal495 liters