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Sailboat specifications and datasheets

First 47.7 deep draft

The First 47.7, here in "deep draft" version, is a 47’7” offshore monohull sailboat designed by Bruce Farr. She was built by Bénéteau (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1999 and 2004 with about 250 hulls completed.

The First 47.7 belongs to the First range. The First 47.7 is as well listed, on Boat-Specs.com, in version Standard.

Bénéteau First 47.7 Bénéteau First 47.7 sailplanBénéteau First 47.7 layoutBénéteau First 47.7 sailingBénéteau First 47.7 sailingBénéteau First 47.7 accommodationsBénéteau First 47.7 accommodations
First 47.7's   Main Features
Model First 47.7
Version Deep draft
Type of hull Monohull
Category Cruiser-racer sailboat
Shipyard
Designer Bruce Farr
Range First
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1999
Last built hull 2004
Number of hulls built About 250
Appendages Keel :
Fin without bulb
Helm 1 wheel
Rudder 1 spade rudder
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
EC certification A
French navigation category 1
Standard public price ex. VAT (indicative only) N/A
First 47.7's   Main dimensions
Length overall 48’ 11”
Hull length 47’ 7”
Waterline length 41’ 4”
Beam (width) 14’ 10”
Draft 9’ 2”
Mast height from DWL 69’ 1”
Light displacement 26555 lbs
Ballast weight 8633 lbs
Ballast type Lead
French customs tonnage 26.53 Tx
First 47.7's   Rig and sails
Upwind sail area 1464 sq.ft
Downwind sail area 2400 sq.ft
Mainsail area 689 sq.ft
Genoa area 775 sq.ft
Symetric spinnaker area 1711 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum (carbon fiber as an option)
Standing rigging Single-strand (ROD) discontinuous
Number of levels of spreaders 3
Spreaders angle 17 °
IiFore triangle height (from mast foot to fore stay attachment) 59’ 8”
JiFore triangle base (from mast foot to bottom of forestay) 17’ 1”
PiMainsail hoist measurement (from tack to head) 57’ 5”
EiMainsail foot measurement (from tack to clew) 21’ 2”
First 47.7's   Performances
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
25.88
Downwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
42.44
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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.
171
Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
33 %
Hull speediAs 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.
8.62 knots
First 47.7's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 55 HP / 100 HP
Fuel type Diesel
Fuel tank capacity 62.1 gal
First 47.7's   Accommodation
Cabin(s) (min/max) 2 / 4
Berth(s) (min/max) 4 / 10
Head(s) 2
Fresh water tank capacity 163.8 gal
Water heater capacity 11.1 gal
Fridge/ice-box capacity 47.6 gal
Maximum headroom 6’ 7”
Galley headroom 6’ 11”
Head headroom 6’ 8”
First 47.7's   Saloon
Maximum headroom 6’ 10”
First 47.7's   Fore cabin
Maximum headroom 6’ 7”
Berth length 6’ 8”
Berth width 5’ 2”
First 47.7's   Aft cabin
Maximum headroom 6’ 7”
Berth length 6’ 7”
Berth width 4’ 11”

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