The Southerly 470 belongs to the Southerly range. The Southerly 470 has also been marketed as Southerly 47.
|Southerly 470's Main Features|
|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||2017|
|Last built hull||Still in production|
|Appendages||Keel (lifting) :
|Rudder||2 spade rudders|
|Cockpit||Closed aft cockpit|
|Standard public price ex. VAT (indicative only)||About
565 000 €(2017)
|Southerly 470's Main dimensions|
|Hull length||47’ 4”|
|Waterline length||42’ 10”|
|Beam (width)||14’ 7”|
|Draft when appendages up||3’ 4”|
|Mast height from DWL||71’ 10”|
|Light displacement||38043 lbs|
|Ballast weight||13492 lbs|
|Southerly 470's Rig and sails|
|Upwind sail area||1406 sq.ft|
|Mainsail area||625 sq.ft|
|Genoa area||780 sq.ft|
|Jib area||491 sq.ft|
|Rigging type||Sloop Marconi fractional|
|Mast position||Deck stepped mast|
|Spars||Mast and boom in Aluminum (carbon fiber as an option)|
|Standing rigging||1x19 strand wire|
|Number of levels of spreaders||2|
|Southerly 470'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 470's Auxiliary engine|
|Engine type||Inboard engine|
|Fuel tank capacity||174.4 gal|
|Southerly 470's Accommodation|
|Fresh water tank capacity||128.9 gal|