J/80 (J/Boats) - Sailboat specifications - Boat-Specs.com (2024)

• Last update: 13rd March 2020

J/80's main features

Model

J/80

Hull type

Monohull

Category

One design sailboat

Sailboat builder

J/Boats

Sailboat designer

Rod Johnstone

Country

United States

Construction

GRP (glass reinforced polyester):
Sandwich fiberglass polyester

Number of hulls built

About1500

First built hull

1993

Last built hull

Still in production

Appendages

Keel : fin with bulb

Helm

Single tiller

Rudder

Single transom hung rudder

Unsinkable

No

Trailerable

Yes

EC design category

iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5m

B

Standard public price ex. VAT (indicative only)

About

31 900 €

(2020)

J/80's main dimensions

Hull length

26’ 2”8 m

Waterline length

22’6.71 m

Beam (width)

8’ 2”2.49 m

Draft

4’ 11”1.5 m

Light displacement (M_LC)

2910 lb1320 kg

Ballast weight

1433 lb650 kg

Ballast type

Lead

French customs tonnage

3.83 Tx

J/80's rig and sails

Upwind sail area

443 ft²41.2 m²

Downwind sail area

926 ft²86 m²

Mainsail area

226 ft²21 m²

Genoa area

217 ft²20.2 m²

Jib area

156 ft²14.5 m²

Stormjib area

32 ft²3 m²

Symmetric spinnaker area

700 ft²65 m²

I

iFore triangle height (from mast foot to fore stay top attachment)

31’ 6”9.6 m

J

iFore triangle base (from mast foot to bottom of forestay)

9’ 6”2.9 m

P

iMainsail hoist measurement (from tack to head)

30’9.14 m

E

iMainsail foot measurement (from tack to clew)

12’ 6”3.81 m

Rigging type

Sloop Marconi 9/10

Mast configuration

Keel stepped mast

Rotating spars

No

Number of levels of spreaders

2

Spreaders angle

Swept-back

Spars construction

Aluminum spars

Standing rigging

1x19 strand wire

J/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.

369 ft²/T34.24 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.

769 ft²/T71.47 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.

124

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.

49 %

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.

6.29 knots

J/80's auxiliary engine

Engine(s)

1 outboard engine

Engine(s) power (min./max.)

3 HP / 4 HP

J/80's accommodations and layout

co*ckpit

Open aft co*ckpit

Berth(s)

4

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