Southerly 35 RS

Sailboat specifications

The Southerly 35 RS is a 35’6” (10.82m) cruising sailboat designed by Humphreys Yacht Design (United Kingdom). She was built since 2007 (and now discontinued) by Northshore (United Kingdom).

Southerly 35 RS's main features

Model: Southerly 35 RS
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Northshore
Sailboat designer: Humphreys Yacht Design
Sailboat range: Southerly
Country: United Kingdom
Construction: Hull and deck: GRP (glass reinforced polyester)
First built hull: 2007
Last built hull: Discontinued
Appendages: Lifting keel : swing keel
Helm: Single helm wheel
Rudder: Twin spade rudders
Unsinkable: No
Trailerable: No
EC design category iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions) A: Wind < force 9, Waves < 10m B: Wind < force 8, Waves < 8m C: Wind < force 6, Waves < 4m D: Wind < force 4, Waves < 0,5m: A
Standard public price ex. VAT (indicative only): N/A €

Southerly 35 RS's main dimensions

Overall length: 35’ 6”10.82 m
Hull length: 35’ 6”10.82 m
Waterline length: 30’ 2”9.22 m
Beam (width): 11’ 8”3.57 m
Draft: 7’ 2”2.18 m
Draft when appendages up: 2’ 5”0.72 m
Mast height from D_WL: 54’ 1”16.5 m
Light displacement (M_LC): 15388 lb6980 kg
Ballast weight: 7176 lb3255 kg

Southerly 35 RS's rig and sails

Upwind sail area: 581 ft²54 m²
Downwind sail area: 883 ft²82 m²
Mainsail area: 355 ft²33 m²
Genoa area: 226 ft²21 m²
Gennaker area: 527 ft²49 m²
Rigging type: Sloop Marconi 9/10
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: Swept-back
Spars construction: Aluminum spars

Southerly 35 RS'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.: 159 ft²/T14.79 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.: 242 ft²/T22.45 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.: 252
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.: 47 %
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.: 7.37 knots