Sun Fast 41 Lead keel

Sailboat specifications

The Sun Fast 41 is a 40’2” (12.25m) cruiser-racer sailboat designed by Douglas Peterson (United States). She was built between 1990 and 1994 by Jeanneau (France) with 548 hulls completed. The Lead keel version displays a deep lead fin offering high righting moment and low drag.

The Sun Fast 41 is as well listed, on Boat-Specs.com, in Standard and Keel and centerboard version (see all the versions compared).

Sun Fast 41's main features

Model: Sun Fast 41
Version: Lead keel
Hull type: Monohull
Category: Offshore cruiser-racer sailboat
Sailboat builder: Jeanneau
Sailboat designer: Douglas Peterson
Sailboat range: Sun Fast
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester with Kevlar reinforcements
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built: 548
First built hull: 1990
Last built hull: 1994
Appendages: Keel : fin without bulb
Helm: Single helm wheel
Rudder: Single spade rudder
Unsinkable: No
Trailerable: No
Former French navigation category: 1
Standard public price ex. VAT (indicative only): N/A €

Sun Fast 41's main dimensions

Overall length: 41’12.5 m
Hull length: 40’ 2”12.25 m
Waterline length: 32’ 8”9.98 m
Beam (width): 12’ 11”3.94 m
Draft: 6’ 11”2.1 m
Light displacement (M_LC): 17196 lb7800 kg
Ballast weight: 6900 lb3130 kg
Ballast type: Lead

Sun Fast 41's rig and sails

Upwind sail area: 948 ft²88.1 m²
Downwind sail area: 1611 ft²149.7 m²
Mainsail area: 361 ft²33.5 m²
Genoa area: 588 ft²54.6 m²
Symmetric spinnaker area: 1251 ft²116.2 m²
I iFore triangle height (from mast foot to fore stay top attachment): 51’ 2”15.6 m
J iFore triangle base (from mast foot to bottom of forestay): 15’ 1”4.6 m
P iMainsail hoist measurement (from tack to head): 44’ 11”13.7 m
E iMainsail foot measurement (from tack to clew): 14’ 1”4.3 m
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Sun Fast 41'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.: 241 ft²/T22.4 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.: 410 ft²/T38.06 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.: 222
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.: 40 %
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.: 7.67 knots