The Idylle 8.80
is a 27’11” (8.5m) motorsailer designed by André Bénéteau
(France). She was built between 1982 and 1987 by Bénéteau
(France). The Fin keel
version adopts a classical fin configuration, the easiest option to provide a low center of gravity.
The Idylle 8.80
is as well listed, on Boat-Specs.com, in Twin keel
version (see all the versions compared
Idylle 8.80's main features
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built
First built hull
Last built hull
Keel : fin without bulb
Single semi-spade rudder
Former French navigation category
Standard public price ex. VAT (indicative only)
Idylle 8.80's main dimensions
28’ 11”8.8 m
27’ 11”8.5 m
9’ 10”3 m
4’ 1”1.25 m
Light displacement (MLC)
7385 lb3350 kg
2425 lb1100 kg
Idylle 8.80's rig and sails
Upwind sail area
411 ft²38.2 m²
140 ft²13 m²
271 ft²25.2 m²
Sloop Marconi masthead
Deck stepped mast
Number of levels of spreaders
1x19 strand wire continuous
Idylle 8.80'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.
184 ft²/T17.06 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.
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.
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.
Idylle 8.80's auxiliary engine
1 inboard engine
Fuel tank capacity
21.1 gal80 liters
Idylle 8.80's accommodations and layout
Closed aft cockpit
3 / 5
Freshwater tank capacity
26.4 gal100 liters
Idylle 8.80's aft cabin
6’ 7”2 m
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