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Sailboat specifications and datasheets

Southerly 57RS

The Southerly 57RS is a 57’4” monohull sailboat designed by Edward Dubois. She was built by Northshore (United Kingdom) and made of monolithic bottom, sandwich sides and deck: fiberglass / polyester vaccum bagged. The production started in 2011 .

The Southerly 57RS belongs to the Southerly range. The Southerly 57RS has also been marketed as Southerly 590.

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Southerly 57RS's   Main Features
Model Southerly 57RS
Type of hull Monohull
Category Offshore cruising sailboat
Shipyard
Designer Edward Dubois
Range Southerly
Construction Hull and deck:
monolithic bottom, sandwich sides and deck: fiberglass / polyester vaccum bagged
First built hull 2011
Last built hull Discontinued
Appendages Keel (lifting) :
Swing keel
Helm 2 wheels
Rudder 2 spade rudders
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
Standard public price ex. VAT (indicative only) N/A
Southerly 57RS's   Main dimensions
Length overall 58’ 2”
Hull length 57’ 4”
Waterline length 52’ 6”
Beam (width) 17’ 1”
Draft 10’ 8”
Draft when appendages up 3’ 6”
Mast height from DWL 84’ 1”
Light displacement 58755 lbs
Maximum displacement 76639 lbs
Ballast weight 18409 lbs
Ballast type Cast iron
Southerly 57RS's   Rig and sails
Upwind sail area 2110 sq.ft
Downwind sail area 3014 sq.ft
Mainsail area 990 sq.ft
Genoa area 1119 sq.ft
Jib area 635 sq.ft
Asymetric spinnaker area 2024 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum
Number of levels of spreaders 3
Spreaders angle Swept-back
Southerly 57RS'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.
21.97
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.
31.38
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.
184
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.
31 %
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.
9.71 knots
Southerly 57RS's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 146 HP
Fuel type Diesel
Fuel tank capacity 367.7 gal
Southerly 57RS's   Accommodation
Cabin(s) (min/max) 3 / 4
Berth(s) (min/max) 6 / 10
Head(s) (min/max) 2 / 3
Fresh water tank capacity 274.7 gal
Holding tank capacity 126.3 gal
Fridge/ice-box capacity 87.7 gal

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