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Sailboat specifications and datasheets

First 28 swing keel

The First 28, here in "swing keel" version, is a 28’2” monohull sailboat designed by Jean Marie Finot. She was built by Bénéteau (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1980 and 1983 with about 600 hulls completed.

The First 28 belongs to the First range. The First 28 is as well listed, on Boat-Specs.com, in version Shoal draft and Deep draft.

Bénéteau First 28 Bénéteau First 28 sailplanBénéteau First 28 layoutBénéteau First 28 sailingBénéteau First 28 sailingBénéteau First 28 accommodations
First 28's   Main Features
Model First 28
Version Swing keel
Type of hull Monohull
Shipyard
Designer Jean Marie Finot
Range First
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1980
Last built hull 1983
Number of hulls built About 600
Appendages Keel (lifting) :
Swing keel
Helm 1 tiller
Rudder 1 spade rudder
Unsinkable No
Trailerable No
Standard public price (indicative only) N/A
First 28's   Main dimensions
Length overall 28’ 10”
Hull length 28’ 2”
Waterline length 24’ 4”
Beam (width) 9’ 10”
Draft 6’ 11”
Draft when appendages up 3’ 10”
Light displacement 5952 lbs
Maximum displacement 2205 lbs
Ballast type Cast iron
French customs tonnage 6.98 Tx
First 28's   Rig and sails
Upwind sail area 472 sq.ft
Downwind sail area 853 sq.ft
Mainsail area 164 sq.ft
Genoa area 308 sq.ft
Solent area 251 sq.ft
Jib area 167 sq.ft
Stormjib area 46 sq.ft
Symetric spinnaker area 689 sq.ft
Rigging type Sloop Marconi masthead
Spars Mast and boom in Aluminum
Standing rigging Continuous
Number of levels of spreaders 1
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 34’ 5”
JiFore triangle base (from mast foot to bottom of forestay) 11’ 6”
PiMainsail hoist measurement (from tack to head) 29’ 11”
EiMainsail foot measurement (from tack to clew) 9’ 6”
First 28's   Performances
HN (French rating) 15.0
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.
22.61
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.
40.87
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.
189
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.
6.60 knots
First 28's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 8 HP / 15 HP
Fuel tank capacity 6.6 gal
First 28's   Accommodation
Cabin(s) 1
Berth(s) (min/max) 5 / 6
Head(s) 1
Fresh water tank capacity 23.8 gal
Maximum headroom 6’
Galley headroom 5’ 8”

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First 285 Keel and centerboard27’ 2”1987
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Bénéteau R/C 27 Shoal draft26’ 1”1978
Arcadia Fin keel28’ 1”1983
Kelt 9m Keel and centerboard29’ 6”1981
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