First 34.7 Deep draft

Sailboat specifications

The First 34.7 is a 32’10” (9.99m) cruiser-racer sailboat designed by Farr Yacht Design (United States). She was built between 2005 and 2009 by Bénéteau (France) with 125 hulls completed. The Deep draft version features a deeper T-shaped keel to grant extra performance especially upwind.

The First 34.7 has also been marketed as First 10R and Bénéteau 34.7 and she is as well listed, on Boat-Specs.com, in Shoal draft version (see all the versions compared).

First 34.7's main features

Model: First 34.7
Version: Deep draft
Hull type: Monohull
Category: Cruiser-racer sailboat
Sailboat builder: Bénéteau
Sailboat designer: Farr Yacht Design
Sailboat range: First
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built: 125
First built hull: 2005
Last built hull: 2009
Appendages: Keel : T-shaped keel (with 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 €

First 34.7's main dimensions

Overall length: 34’10.36 m
Hull length: 32’ 10”9.99 m
Waterline length: 28’ 7”8.73 m
Beam (width): 11’ 1”3.37 m
Draft: 6’ 7”2 m
Mast height from D_WL: 51’ 10”15.8 m
Light displacement (M_LC): 9965 lb4520 kg
Ballast weight: 3682 lb1670 kg
Ballast type: Lead
French customs tonnage: 11.00 Tx

First 34.7's rig and sails

Upwind sail area: 757 ft²70.3 m²
Mainsail area: 380 ft²35.3 m²
Genoa area: 377 ft²35 m²
I iFore triangle height (from mast foot to fore stay top attachment): 43’ 2”13.17 m
J iFore triangle base (from mast foot to bottom of forestay): 12’3.67 m
P iMainsail hoist measurement (from tack to head): 42’12.8 m
E iMainsail foot measurement (from tack to clew): 14’ 8”4.49 m
Rigging type: Sloop Marconi 9/10
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 20 °
Spars construction: Aluminum spars
Standing rigging: Dyform

First 34.7's performances

HN (French rating) iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.: 26.5
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.: 277 ft²/T25.72 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.: 192
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.: 7.17 knots