The Westerly Centaur is as well listed, on Boat-Specs.com, in version Ketch.
|Westerly Centaur's Main Features|
|Type of hull||Monohull|
|Designer||John Laurent Giles|
|Construction||GRP (glass reinforced polyester)|
|First built hull||1969|
|Last built hull||1980|
|Number of hulls built||2444|
|Appendages||Twin keel :
Fin without bulb
|Rudder||1 spade rudder|
|Cockpit||Closed aft cockpit|
|French navigation category||2|
|Standard public price ex. VAT (indicative only)||N/A|
|Westerly Centaur's Main dimensions|
|Hull length||25’ 11”|
|Waterline length||21’ 8”|
|Beam (width)||8’ 6”|
|Mast height from DWL||36’ 8”|
|Light displacement||6173 lbs|
|Ballast weight||2800 lbs|
|Ballast type||Cast iron|
|French customs tonnage||6.65 Tx|
|Westerly Centaur's Rig and sails|
|Upwind sail area||401 sq.ft|
|Mainsail area||161 sq.ft|
|Genoa area||240 sq.ft|
|Solent area||182 sq.ft|
|Jib area||133 sq.ft|
|Stormjib area||45 sq.ft|
|Rigging type||Sloop Marconi masthead|
|Mast position||Deck stepped mast|
|Spars||Mast and boom in Aluminum|
|Standing rigging||1x19 strand wire continuous|
|Number of levels of spreaders||1|
|Spreaders angle||0 °|
|Westerly Centaur'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.
|Westerly Centaur's Auxiliary engine|
|Engine type||Inboard engine|
|Engine (min/max)||10 HP / 25 HP|
|Fuel tank capacity||11.9 gal|
|Westerly Centaur's Accommodation|
|Berth(s) (min/max)||4 / 6|
|Fresh water tank capacity||17.7 gal|