Sun Way 25 Shoal draft

Sailboat specifications

The Sun Way 25 is a 24’10” (7.55m) cruising sailboat designed by Harlé-Mortain (France). She was built between 1990 and 1994 by Jeanneau (France). The Shoal draft version is offered with a short keel fitted with large winglets. This configuration provides an interesting draft / low center of gravity / upwind performance trade-off.

The Sun Way 25 is as well listed, on Boat-Specs.com, in Deep draft and Keel and centerboard version (see all the versions compared).

Sun Way 25's main features

Model: Sun Way 25
Version: Shoal draft
Hull type: Monohull
Category: Coastal cruising sailboat
Sailboat builder: Jeanneau
Sailboat designer: Harlé-Mortain
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built: About 300
First built hull: 1990
Last built hull: 1994
Appendages: Keel : wing keel
Helm: Single tiller
Rudder: Single spade rudder
Unsinkable: Yes
Trailerable: No
Former French navigation category: 3
Standard public price ex. VAT (indicative only): N/A €

Sun Way 25's main dimensions

Overall length: 25’ 4”7.7 m
Hull length: 24’ 10”7.55 m
Waterline length: 21’ 8”6.6 m
Beam (width): 9’ 1”2.76 m
Waterline beam (width): 7’ 7”2.32 m
Draft: 3’0.9 m
Mast height from D_WL: 37’ 11”11.55 m
Fore freeboard: 3’ 2”0.99 m
Mid-ship freeboard: 2’ 10”0.85 m
Light displacement (M_LC): 4475 lb2030 kg
Maximum displacement (M_LDC): 5952 lb2700 kg
Ballast weight: 1102 lb500 kg
Ballast type: Cast iron
French customs tonnage: 5.10 Tx

Sun Way 25's rig and sails

Upwind sail area: 330 ft²30.69 m²
Downwind sail area: 589 ft²54.74 m²
Mainsail area: 180 ft²16.74 m²
Genoa area: 150 ft²13.95 m²
Symmetric spinnaker area: 409 ft²38 m²
Rigging type: Sloop Marconi 7/8
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 Way 25'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.: 206 ft²/T19.14 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.: 367 ft²/T34.14 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.: 200
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.: 25 %
Wetted area: 155 ft²14.37 m²
Righting moment @ 1° iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after heeling. Its value corresponds to the torque needed to heel the boat for this angle. Higher the righting moment is for an angle, greater is the stability.: 233 lb.ft32 kg.m
Maximum transverse section: 9 ft²0.82 m²
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