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Sailboat specifications and datasheets

First 30 fin keel

The First 30, here in "fin keel" version, is a 28’11” monohull sailboat designed by André Mauric. She was built by Bénéteau (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1977 and 1981 with 969 hulls completed.

The First 30 belongs to the First range and the Half Tonner class. The First 30 has also been marketed as Bénéteau R/C 30.

Bénéteau First 30 Bénéteau First 30 sailplanBénéteau First 30 layoutBénéteau First 30 sailingBénéteau First 30 accommodations
First 30's   Main Features
Model First 30
Version Fin keel
Type of hull Monohull
Shipyard
Designer André Mauric
Range First
Class Half Tonner
Construction Hull and deck:
monolithic fiberglass / polyester
First built hull 1977
Last built hull 1981
Number of hulls built 969
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 semi-spade rudder
Unsinkable No
Trailerable No
French navigation category 2
Standard public price (indicative only) N/A
First 30's   Main dimensions
Length overall 29’ 5”
Hull length 28’ 11”
Waterline length 25’ 5”
Beam (width) 9’ 5”
Waterline beam (width) 7’ 11”
Draft 5’ 8”
Mast height from DWL 39’ 10”
Fore freeboard 3’ 1”
Mid-ship freeboard 3’ 1”
Light displacement 7826 lbs
Maximum displacement 8995 lbs
Ballast weight 3748 lbs
Ballast type Cast iron
French customs tonnage 7.10 Tx
First 30's   Rig and sails
Upwind sail area 524 sq.ft
Downwind sail area 922 sq.ft
Mainsail area 168 sq.ft
Genoa area 355 sq.ft
Jib area 274 sq.ft
Symetric spinnaker area 753 sq.ft
Rigging type Sloop Marconi masthead
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 36’ 8”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 2”
PiMainsail hoist measurement (from tack to head) 32’
EiMainsail foot measurement (from tack to clew) 11’
First 30's   Performances
HN (French rating) 14.5
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.
20.91
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.
36.81
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.
216
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.
48 %
Wetted surface 185 sq.ft
Righting moment @ 1°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
400 lbs.ft
Maximum transverse section 11 sq.ft
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.
6.76 knots
First 30's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 15 HP
Fuel type Diesel
Fuel tank capacity 7.9 gal
First 30's   Accommodation
Cabin(s) 1
Berth(s) 7
Head(s) 1
Fresh water tank capacity 23.8 gal
Chart table 2’ 10” x 1’ 10”
Maximum headroom 6’
Head headroom 5’ 5”
First 30's   Saloon
Maximum headroom 5’ 8”
Saloon table length 3’ 6”
Saloon table width 2’ 7”
Berth length 6’ 2”
Berth width 2’
First 30's   Fore cabin
Maximum headroom 5’
Berth length 7’ 2”
Berth width 6’ 1”
First 30's   Aft cabin
Berth length 5’ 11”
Berth width 3’

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