First 45 Shoal draft

Sailboat specifications

The First 45 is a 44’11” (13.68m) cruiser-racer sailboat designed by Philippe Briand (France). She was built since 2007 (and now discontinued) by Bénéteau (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 First 45 is as well listed, on Boat-Specs.com, in Standard and Regatta version (see all the versions compared).

First 45's main features

Model: First 45
Version: Shoal draft
Hull type: Monohull
Category: Offshore cruiser-racer sailboat
Sailboat builder: Bénéteau
Sailboat designer: Philippe Briand
Sailboat range: First
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa thermo-plastic Tecrothène 109, rotomolded polyester
First built hull: 2007
Last built hull: Discontinued
Appendages: Keel : wing keel
Helm: Twin helm wheels
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 €

First 45's main dimensions

Overall length: 46’ 2”14.07 m
Hull length: 44’ 11”13.68 m
Waterline length: 39’ 5”12.01 m
Beam (width): 13’ 10”4.2 m
Draft: 6’ 7”2 m
Mast height from D_WL: 68’ 1”20.75 m
Light displacement (M_LC): 26819 lb12165 kg
Ballast weight: 9877 lb4480 kg
Ballast type: Cast iron
French customs tonnage: 21.00 Tx

First 45's rig and sails

Upwind sail area: 1248 ft²115.9 m²
Downwind sail area: 2104 ft²195.5 m²
Mainsail area: 597 ft²55.5 m²
Genoa area: 650 ft²60.4 m²
Symmetric spinnaker area: 1507 ft²140 m²
I iFore triangle height (from mast foot to fore stay top attachment): 56’ 11”17.35 m
J iFore triangle base (from mast foot to bottom of forestay): 17’ 6”5.33 m
P iMainsail hoist measurement (from tack to head): 55’ 10”17 m
E iMainsail foot measurement (from tack to clew): 18’5.5 m
Rigging type: Sloop Marconi 9/10
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 3
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: Dyform discontinuous

First 45'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.: 236 ft²/T21.91 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.: 398 ft²/T36.96 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.: 199
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.: 37 %
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.: 8.41 knots