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: Jeanneau
Sailboat designer: Philippe Harlé & Groupe Finot
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 (M_LC): 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