The Southerly 42 RST belongs to the Southerly range. The Southerly 42 RST has also been marketed as Southerly 430.
|Southerly 42 RST's Main Features|
|Model||Southerly 42 RST|
|Type of hull||Monohull|
|Category||Offshore deck saloon cruising sailboat|
|Construction||Hull and deck:
single skin bottom, sandwich sides and deck: fiberglass / vinylester vacuum bagged
|First built hull||2007|
|Last built hull||2017|
|Appendages||Keel (lifting) :
|Rudder||2 spade rudders|
|Cockpit||Open aft cockpit|
|Standard public price ex. VAT (indicative only)||About
440 000 €(2017)
|Southerly 42 RST's Main dimensions|
|Hull length||42’ 2”|
|Waterline length||36’ 6”|
|Beam (width)||13’ 2”|
|Draft when appendages up||2’ 10”|
|Mast height from DWL||61’ 6”|
|Light displacement||25003 lbs|
|Ballast weight||8091 lbs|
|Southerly 42 RST's Rig and sails|
|Upwind sail area||792 sq.ft|
|Mainsail area||468 sq.ft|
|Jib area||325 sq.ft|
|Rigging type||Sloop Marconi fractional|
|Mast position||Deck stepped mast|
|Spars||Mast and boom in Aluminum|
|Standing rigging||1x19 strand wire|
|Number of levels of spreaders||2|
|Southerly 42 RST'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.
|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.
|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.
|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.
|Southerly 42 RST's Auxiliary engine|
|Engine type||Inboard engine|
|Fuel tank capacity||79.3 gal|
|Southerly 42 RST's Accommodation|
|Cabin(s) (min/max)||2 / 3|
|Berth(s) (min/max)||4 / 8|
|Fresh water tank capacity||71.3 gal|