Detailed sailboat specifications and datasheets since 2015
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Brin de folie Deep draft

Sailboat specifications

The Brin de folie is a 29’6” (9m) cruising sailboat designed by Philippe Harlé (France) and Groupe Finot (France). She was built between 1975 and 1979 by Jeanneau (France) with 820 hulls completed. The Deep draft version displays a deeper fin allowing a lower center of gravity and extra performance especially upwind.

The Brin de folie is as well listed, on Boat-Specs.com, in Standard version (see all the versions compared).

Brin de folie's main features

Model
Brin de folie
Version
Deep draft
Hull type
Monohull
Category
Cruising sailboat
Sailboat builder
Sailboat designer
Country
France
Construction
Hull and deck: GRP (glass reinforced polyester)
Number of hulls built
820
First built hull
1975
Last built hull
1979
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single semi-spade rudder
Unsinkable
No
Trailerable
No
Former French navigation category
2
Standard public price ex. VAT (indicative only)
N/A

Brin de folie's main dimensions

Hull length
29’ 6”9 m
Waterline length
22’ 1”6.75 m
Beam (width)
9’ 10”3 m
Draft
5’ 5”1.65 m
Light displacement (MLC)
5512 lb2500 kg
Ballast weight
2205 lb1000 kg
Ballast type
Cast iron
French customs tonnage
7.26 Tx

Brin de folie's rig and sails

Upwind sail area
474 ft²44 m²
Downwind sail area
845 ft²78.5 m²
Mainsail area
156 ft²14.5 m²
Genoa area
318 ft²29.5 m²
Jib area
151 ft²14 m²
Stormjib area
59 ft²5.5 m²
Symmetric spinnaker area
689 ft²64 m²
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
0 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

Brin de folie's performances

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.
257 ft²/T23.89 m²/T
Downwind 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.
459 ft²/T42.62 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.
230
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.
40 %
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.
6.31 knots

Brin de folie's auxiliary engine

Engine(s)
1 outboard or inboard engine
Engine(s) power (min./max.)
10 HP / 11 HP
Fuel type
Diesel for inboard engine, gas for outboard

Brin de folie's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
1
Berth(s) (min./max.)
6 / 7
Head(s)
1
Freshwater tank capacity
23.8 gal90 liters
Maximum headroom
6’ 1”1.87 m
Head headroom
4’ 7”1.4 m

Brin de folie's saloon

Maximum headroom
6’ 1”1.87 m
Saloon table length
3’ 7”1.1 m
Saloon table width
2’ 8”0.82 m

Brin de folie's fore cabin

Maximum headroom
5’ 1”1.55 m
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