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Sailboat specifications and datasheets

Platu 25

The Platu 25 is a 24’6” coastal monohull sailboat designed by Bruce Farr. She was built by Bénéteau (France) and made of monolithic fiberglass / polyester. The production started in 1992 .

The Platu 25 belongs to the ISAF class. The Platu 25 has also been marketed as Bénéteau 25.

Bénéteau Platu 25 Bénéteau Platu 25 sailplanBénéteau Platu 25 layoutBénéteau Platu 25 sailingBénéteau Platu 25 accommodations
Platu 25's   Main Features
Model Platu 25
Type of hull Monohull
Category One design
Cockpit Open aft cockpit
Shipyard
Designer Bruce Farr
Class ISAF
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1992
Last built hull Discontinued
Appendages Keel :
L-shaped keel (with bulb)
Helm 1 tiller
Rudder 1 spade rudder
Unsinkable No
Trailerable Yes
EC certification C
Standard public price ex. VAT (indicative only) N/A
Platu 25's   Main dimensions
Length overall 24’ 7”
Hull length 24’ 6”
Waterline length 22’ 1”
Beam (width) 8’ 7”
Draft 5’ 2”
Mast height from DWL 39’ 11”
Light displacement 2601 lbs
Ballast weight 1118 lbs
Ballast type Cast iron
Platu 25's   Rig and sails
Upwind sail area 349 sq.ft
Downwind sail area 775 sq.ft
Mainsail area 215 sq.ft
Genoa area 133 sq.ft
Symetric spinnaker area 560 sq.ft
Rigging type Sloop Marconi 7/8
Rotating spars No
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire discontinuous
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 29’ 11”
JiFore triangle base (from mast foot to bottom of forestay) 8’ 6”
PiMainsail hoist measurement (from tack to head) 31’ 6”
EiMainsail foot measurement (from tack to clew) 12’
Platu 25's   Performances
HN (French rating) 22.0
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.
29.02
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.
64.48
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.
109
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.
43 %
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.
6.30 knots
Platu 25's   Auxiliary engine
Engine type Outboard engine
Engine 7 HP
Platu 25's   Accommodation
Berth(s) 2

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