Idylle 15.50

Sailboat specifications

The Idylle 15.50 is a 49’11” (15.22m) cruising sailboat designed by Frers Naval Architecture & Engineering (Argentina). She was built between 1985 and 1988 by Bénéteau (France).

Idylle 15.50's main features

Model: Idylle 15.50
Hull type: Monohull
Category: Offshore cruising sailboat
Sailboat builder: Bénéteau
Sailboat designer: Frers Naval Architecture & Engineering
Sailboat range: Idylle
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
First built hull: 1985
Last built hull: 1988
Appendages: Keel : fin without bulb
Helm: Single helm wheel
Rudder: Single spade rudder
Unsinkable: No
Trailerable: No
Former French navigation category: 1
Standard public price ex. VAT (indicative only): N/A €

Idylle 15.50's main dimensions

Overall length: 51’ 5”15.68 m
Hull length: 49’ 11”15.22 m
Waterline length: 37’ 11”11.56 m
Beam (width): 14’ 8”4.47 m
Draft: 6’1.83 m
Light displacement (M_LC): 33069 lb15000 kg
Ballast weight: 13007 lb5900 kg

Idylle 15.50's rig and sails

Upwind sail area: 1410 ft²131 m²
Mainsail area: 474 ft²44 m²
Genoa area: 936 ft²87 m²
Staysail area: 258 ft²24 m²
Stormjib area: 161 ft²15 m²
Rigging type: Cutter Marconi masthead
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Idylle 15.50'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.: 232 ft²/T21.54 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.: 275
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.: 39 %
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.: 8.25 knots