Sun 2500 Keel and centerboard

Sailboat specifications

The Sun 2500 is a 24’7” (7.5m) cruising sailboat designed by Olivier Petit (France). She was built between 2004 and 2008 by Jeanneau (France). The Keel and centerboard version features a centerboard inside of a short fin-keel allowing shoal draft while maintaining upwind capabilities.

The Sun 2500 is as well listed, on Boat-Specs.com, in Fin keel version (see all the versions compared).

Sun 2500's main features

Model: Sun 2500
Version: Keel and centerboard
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Jeanneau
Sailboat designer: Olivier Petit
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
First built hull: 2004
Last built hull: 2008
Appendages: Centerboard : pivoting centerboard in the keel
Helm: Single tiller
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: C
Standard public price ex. VAT (indicative only): N/A €

Sun 2500's main dimensions

Overall length: 24’ 7”7.5 m
Hull length: 24’ 7”7.5 m
Waterline length: 23’ 6”7.15 m
Beam (width): 9’ 6”2.9 m
Draft: 5’ 8”1.75 m
Draft when appendages up: 2’ 4”0.69 m
Mast height from D_WL: 38’ 8”11.79 m
Light displacement (M_LC): 4938 lb2240 kg
Ballast weight: 1477 lb670 kg
French customs tonnage: 5.76 Tx

Sun 2500's rig and sails

Upwind sail area: 324 ft²30.1 m²
Downwind sail area: 566 ft²52.6 m²
Mainsail area: 179 ft²16.6 m²
Genoa area: 145 ft²13.5 m²
Symmetric spinnaker area: 388 ft²36 m²
I iFore triangle height (from mast foot to fore stay top attachment): 29’ 11”9.12 m
P iMainsail hoist measurement (from tack to head): 30’ 2”9.2 m
Rigging type: Sloop Marconi 9/10
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire continuous

Sun 2500'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.: 189 ft²/T17.58 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.: 331 ft²/T30.72 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.: 174
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.: 30 %
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.: 6.49 knots