Detailed sailboat specifications and datasheets since 2015
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Jouët 920 Deep draft

Sailboat specifications

The Jouët 920 is a 30’5” (9.27m) cruising sailboat designed by Daniel Tortarolo (France). She was built between 1979 and 1984 by Yachting France (France). The Deep draft version displays a deeper fin allowing a lower center of gravity and extra performance especially upwind.

The Jouët 920 is as well listed, on Boat-Specs.com, in Keel and centerboard version (see all the versions compared).

Jouët 920's main features

Model
Jouët 920
Version
Deep draft
Hull type
Monohull
Category
Cruising sailboat
Sailboat builder
Sailboat designer
Sailboat range
Sailboat collection
Country
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built
About 200
First built hull
1979
Last built hull
1984
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

Jouët 920's main dimensions

Hull length
30’ 5”9.27 m
Waterline length
23’ 10”7.25 m
Beam (width)
10’ 2”3.12 m
Waterline beam (width)
8’ 7”2.62 m
Draft
5’ 10”1.76 m
Mast height from DWL
36’ 7”11.15 m
Fore freeboard
3’ 5”1.03 m
Mid-ship freeboard
3’ 2”0.97 m
Light displacement (MLC)
6658 lb3020 kg
Maximum displacement (MLDC)
8157 lb3700 kg
Ballast weight
2425 lb1100 kg
Ballast type
Cast iron
French customs tonnage
9.00 Tx

Jouët 920's rig and sails

Upwind sail area
539 ft²50.04 m²
Downwind sail area
916 ft²85.14 m²
Mainsail area
195 ft²18.14 m²
Genoa area
343 ft²31.9 m²
Jib area
195 ft²18.1 m²
Symmetric spinnaker area
721 ft²67 m²
P
 iMainsail hoist measurement (from tack to head)
30’ 8”9.35 m
E
 iMainsail foot measurement (from tack to clew)
10’ 6”3.2 m
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

Jouët 920's performances

HN (French rating)
 iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.
15.0
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.
258 ft²/T23.95 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.
439 ft²/T40.75 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.
224
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.
36 %
Wetted area
199 ft²18.53 m²
Maximum transverse section
11 ft²1.02 m²
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.
6.54 knots

Jouët 920's auxiliary engine

Engine(s)
1 inboard engine
Engine(s) power (min./max.)
8 HP / 13 HP
Fuel type
Diesel
Fuel tank capacity
10.6 gal40 liters

Jouët 920's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
2
Berth(s)
6
Head(s)
1
Freshwater tank capacity
37 gal140 liters
Maximum headroom
6’ 1”1.85 m
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