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Sailboat specifications and datasheets

Idylle 11.50 fin keel

The Idylle 11.50, here in "fin keel" version, is a 36’5” offshore monohull sailboat designed by Jean Berret. She was built by Bénéteau (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1983 and 1988.

The Idylle 11.50 belongs to the Idylle range.

Bénéteau Idylle 11.50 Bénéteau Idylle 11.50 sailplanBénéteau Idylle 11.50 layoutBénéteau Idylle 11.50 sailingBénéteau Idylle 11.50 sailingBénéteau Idylle 11.50 accommodations
Idylle 11.50's   Main Features
Model Idylle 11.50
Version Fin keel
Type of hull Monohull
Shipyard
Designer Jean Berret
Range Idylle
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1983
Last built hull 1988
Appendages Keel :
Fin without bulb
Helm 1 wheel
Rudder 1 rudder on skeg
Unsinkable No
Trailerable No
French navigation category 1
Standard public price (indicative only) N/A
Idylle 11.50's   Main dimensions
Length overall 37’ 8”
Hull length 36’ 5”
Waterline length 28’ 11”
Beam (width) 12’ 1”
Draft 4’ 5”
Light displacement 11464 lbs
Ballast weight 5512 lbs
Ballast type Cast iron
Idylle 11.50's   Rig and sails
Upwind sail area 750 sq.ft
Downwind sail area 1299 sq.ft
Mainsail area 287 sq.ft
Genoa area 463 sq.ft
Solent area 301 sq.ft
Stormjib area 75 sq.ft
Symetric spinnaker area 1012 sq.ft
Rigging type Sloop Marconi masthead
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire
Number of levels of spreaders 2
Spreaders angle 0 °
IiFore triangle height (from mast foot to fore stay attachment) 41’ 8”
JiFore triangle base (from mast foot to bottom of forestay) 12’
PiMainsail hoist measurement (from tack to head) 35’ 10”
EiMainsail foot measurement (from tack to clew) 11’ 6”
Idylle 11.50'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.
23.22
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.
40.21
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 %
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.
7.20 knots
Idylle 11.50's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 50 HP
Fuel type Diesel
Fuel tank capacity 21.1 gal
Idylle 11.50's   Accommodation
Cabin(s) 2
Berth(s) 7
Head(s) 1
Fresh water tank capacity 105.7 gal
Fridge/ice-box capacity 23.8 gal
Maximum headroom 6’ 6”
Head headroom 6’ 1”
Idylle 11.50's   Saloon
Maximum headroom 6’ 4”
Saloon table length 3’ 6”
Saloon table width 3’ 1”
Idylle 11.50's   Fore cabin
Maximum headroom 6’ 1”
Idylle 11.50's   Aft cabin
Maximum headroom 6’ 1”

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