First 435 Deep draft

Sailboat specifications

The First 435 is a 44’ (13.4m) cruiser-racer sailboat designed by Frers Naval Architecture & Engineering (Argentina). She was built since 1984 (and now discontinued) by Bénéteau (France). The Deep draft version displays a deeper fin allowing a lower center of gravity and extra performance especially upwind.

The First 435 is as well listed, on Boat-Specs.com, in Shoal draft and Keel and centerboard version (see all the versions compared).

First 435's main features

Model: First 435
Version: Deep draft
Hull type: Monohull
Category: Offshore cruiser-racer sailboat
Sailboat builder: Bénéteau
Sailboat designer: Frers Naval Architecture & Engineering
Sailboat range: First
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
First built hull: 1984
Last built hull: Discontinued
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 €

First 435's main dimensions

Overall length: 44’ 7”13.6 m
Hull length: 44’13.4 m
Waterline length: 36’ 1”11 m
Beam (width): 13’ 4”4.05 m
Draft: 7’ 6”2.3 m
Light displacement (M_LC): 23810 lb10800 kg
Ballast weight: 9259 lb4200 kg

First 435's rig and sails

Upwind sail area: 1132 ft²105.2 m²
Downwind sail area: 1993 ft²185.2 m²
Mainsail area: 422 ft²39.2 m²
Genoa area: 710 ft²66 m²
Solent area: 481 ft²44.73 m²
Jib area: 347 ft²32.2 m²
Stormjib area: 154 ft²14.3 m²
Symmetric spinnaker area: 1572 ft²146 m²
Rigging type: Sloop Marconi masthead
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

First 435'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.: 232 ft²/T21.53 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.: 408 ft²/T37.9 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.: 230
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.: 39 %
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.: 8.05 knots