Sun Fast 42 Lead keel

Sailboat specifications

The Sun Fast 42 is a 40’10” (12.45m) cruiser-racer sailboat designed by Philippe Briand (France). She was built between 1996 and 1998 by Jeanneau (France) with 25 hulls completed. The Lead keel version displays a deep lead fin offering high righting moment and low drag.

The Sun Fast 42 is as well listed, on Boat-Specs.com, in Standard version (see all the versions compared).

Sun Fast 42's main features

Model: Sun Fast 42
Version: Lead keel
Hull type: Monohull
Category: Offshore cruiser-racer sailboat
Sailboat builder: Jeanneau
Sailboat designer: Philippe Briand
Sailboat range: Sun Fast
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich fiberglass polyester
Number of hulls built: 25
First built hull: 1996
Last built hull: 1998
Appendages: Keel : fin without bulb
Helm: Single helm wheel
Rudder: Single spade rudder
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: A
Standard public price ex. VAT (indicative only): N/A €

Sun Fast 42's main dimensions

Overall length: 41’ 8”12.7 m
Hull length: 40’ 10”12.45 m
Waterline length: 35’ 1”10.69 m
Beam (width): 12’ 10”3.91 m
Draft: 7’ 6”2.3 m
Light displacement (M_LC): 18739 lb8500 kg
Ballast weight: 7055 lb3200 kg
Ballast type: Lead
French customs tonnage: 14.33 Tx

Sun Fast 42's rig and sails

Upwind sail area: 1108 ft²102.9 m²
Downwind sail area: 1915 ft²177.9 m²
Mainsail area: 466 ft²43.3 m²
Genoa area: 642 ft²59.6 m²
Symmetric spinnaker area: 1449 ft²134.6 m²
I iFore triangle height (from mast foot to fore stay top attachment): 54’ 10”16.7 m
J iFore triangle base (from mast foot to bottom of forestay): 15’ 5”4.68 m
P iMainsail hoist measurement (from tack to head): 48’ 2”14.7 m
E iMainsail foot measurement (from tack to clew): 16’ 8”5.1 m
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 8 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Sun Fast 42'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.: 266 ft²/T24.71 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.: 460 ft²/T42.71 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.: 197
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.: 38 %
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.: 7.94 knots