Detailed sailboat specifications and datasheets since 2015
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Centaur Sloop

Sailboat specifications

The Centaur is a 25’11” (7.9m) cruising sailboat designed by John Laurent Giles (United Kingdom). She was built between 1969 and 1980 by Westerly (United Kingdom) with 2444 hulls completed. The Sloop version is offered with a classic masthead Marconi sloop rig.

The Centaur is as well listed, on Boat-Specs.com, in Ketch version (see all the versions compared).

Centaur's main features

Model
Centaur
Version
Sloop
Hull type
Monohull
Category
Cruising sailboat
Sailboat builder
Sailboat designer
Country
United Kingdom
Construction
Hull and deck: GRP (glass reinforced polyester)
Number of hulls built
2444
First built hull
1969
Last built hull
1980
Appendages
Twin keel : fin without bulb
Helm
Single tiller
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
Former French navigation category
2
Standard public price ex. VAT (indicative only)
N/A

Centaur's main dimensions

Hull length
25’ 11”7.9 m
Waterline length
21’ 8”6.6 m
Beam (width)
8’ 6”2.6 m
Draft
3’0.9 m
Mast height from DWL
36’ 8”11.18 m
Light displacement (MLC)
6173 lb2800 kg
Ballast weight
2800 lb1270 kg
Ballast type
Cast iron
French customs tonnage
6.65 Tx

Centaur's rig and sails

Upwind sail area
401 ft²37.3 m²
Mainsail area
161 ft²15 m²
Genoa area
240 ft²22.3 m²
Solent area
182 ft²16.9 m²
Jib area
133 ft²12.4 m²
Stormjib area
45 ft²4.2 m²
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
0 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Centaur'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.
202 ft²/T18.78 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.
276
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.
45 %
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.
6.24 knots

Centaur's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power (min./max.)
10 HP / 25 HP
Fuel type
Diesel
Fuel tank capacity
11.9 gal45 liters

Centaur's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
1
Berth(s) (min./max.)
4 / 6
Head(s)
1
Freshwater tank capacity
17.7 gal67 liters
Maximum headroom
6’1.83 m
Have you spotted incorrect data?  You can report it in the forum or contact the webmaster

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1972
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1984
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