The J90 is a 30.2ft fractional sloop designed by Johnstone and built in fiberglass by J Boats between 1997 and 1998.
5 units have been built.
The J90 is an ultralight sailboat which is a very high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.
Main features
| Model | J90 | ||
| Length | 30.20 ft | ||
| Beam | 8.50 ft | ||
| Draft | 6.50 ft | ||
| Country | United states (North America) | ||
| Estimated price | $ 0 | ?? | 
Ratios
| Sail area / displ. | 32.35 | ||
| Ballast / displ. | 56.36 % | ||
| Displ. / length | 74.85 | ||
| Comfort ratio | 10.54 | ||
| Capsize | 2.29 | 
Hull
| Hull type | Monohull fin keel with bulb and spade rudder | ||
| Construction | Fiberglass | ||
| Waterline length | 27 ft | ||
| Maximum draft | 6.50 ft | ||
| Displacement | 3300 lbs | ||
| Ballast | 1860 lbs | ||
| Hull speed | 6.96 knots | 
Rigging
| Rigging | Fractional Sloop | ||
| Sail area (100%) | 447 sq.ft | ||
| Air draft | 0 ft | ?? | |
| Sail area fore | 186.90 sq.ft | ||
| Sail area main | 259.91 sq.ft | ||
| I | 35.60 ft | ||
| J | 10.50 ft | ||
| P | 35.85 ft | ||
| E | 14.50 ft | 
Engine
| Nb engines | 1 | ||
| Total power | 0 HP | ||
| Fuel capacity | 0 gals | 
Accommodations
| Water capacity | 0 gals | ||
| Headroom | 0 ft | ||
| Nb of cabins | 0 | ||
| Nb of berths | 0 | ||
| Nb heads | 0 | 
Builder data
| Builder | J Boats | ||
| Designer | Johnstone | ||
| First built | 1997 | ||
| Last built | 1998 | ||
| Number built | 5 | 
 
                         
                                                     
                                     
                                         
                                         
                                         
                                         
                                         
                                        