J/99
Sailboat specifications
The J/99 is a 32’7” (9.94m) racer-cruiser sailboat designed by Alan Johnstone (United States). She is built since 2019 by J/Boats (United States). She has been awarded "2020 - SAIL magazine - Best Performance Boat 31ft and over" and "2020 - Sailing World - Boat of the Year: Best Crossover".
Find out more about the J/99 on Boat-Spec's blog: European Yacht of the Year 2020 nominated sailboats.
Find out more about the J/99 on Boat-Spec's blog: European Yacht of the Year 2020 nominated sailboats.
J/99's main features
- Model
- J/99
- Hull type
- Monohull
- Category
- Racer-cruiser sailboat
- Sailboat builder
- Sailboat designer
- Country
- United States
- Construction
- GRP (glass reinforced polyester):
- Hull: Sandwich foam fiberglass polyester (vacuum infusion)
- Deck: Sandwich balsa fiberglass polyester (vacuum infusion) - First built hull
- 2019
- Last built hull
- Still in production
- Award(s)
- 2020: SAIL magazine - Best Performance Boat 31ft and over
- 2020: Sailing World - Boat of the Year: Best Crossover
- Appendages
- Keel : L-shaped keel (with bulb)
- Helm
- Single tiller
- Rudder
- Single spade rudder
- Unsinkable
- No
- Trailerable
- No
- Standard public price ex. VAT (indicative only)
- About115 000 €(2020)
J/99's main dimensions
- Hull length
- 32’ 7”9.94 m
- Waterline length
- 28’ 7”8.72 m
- Beam (width)
- 11’ 2”3.4 m
- Draft
- 6’ 7”2 m
- Light displacement (MLC)
- 8378 lb3800 kg
- Ballast weight
- 3351 lb1520 kg
- Ballast type
- Cast iron fin with lead bulb
J/99's rig and sails
- Upwind sail area
- 637 ft²59.2 m²
- Downwind sail area
- 1421 ft²132 m²
- Mainsail area
- 334 ft²31 m²
- Genoa area
- 304 ft²28.2 m²
- Symmetric spinnaker area
- 969 ft²90 m²
- Asymmetric spinnaker area
- 1087 ft²101 m²
- IiFore triangle height (from mast foot to fore stay top attachment)
- 43’ 4”13.2 m
- JiFore triangle base (from mast foot to bottom of forestay)
- 12’ 7”3.83 m
- PiMainsail hoist measurement (from tack to head)
- 41’ 10”12.74 m
- EiMainsail foot measurement (from tack to clew)
- 14’ 4”4.36 m
- Rigging type
- Sloop Marconi fractional
- Mast configuration
- Keel stepped mast
- Rotating spars
- No
- Number of levels of spreaders
- 2
- Spreaders angle
- Swept-back
- Spars construction
- Aluminum spars
- Standing rigging
- Dyform discontinuous
J/99's performances
- Upwind sail area to displacementiThe 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. - 262 ft²/T24.31 m²/T
- Downwind sail area to displacementiThe 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. - 584 ft²/T54.21 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. - 162
- Ballast ratioiThe 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. - 40 %
- Critical hull speediAs 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. - 7.17 knots
J/99's auxiliary engine
- Engine(s)
- 1 inboard engine
- Engine(s) power
- 18 HP
- Fuel type
- Diesel
- Fuel tank capacity
- 13.2 gal50 liters
J/99's accommodations and layout
- Cockpit
- Open aft cockpit
- Cabin(s)
- 2
- Berth(s) (min./max.)
- 4 / 6
- Head(s)
- 1
- Freshwater tank capacity
- 26.4 gal100 liters
J/Boats J/99 interior and accommodations - - 13/14
Picture extracted from the commercial documentation © J/Boats
Picture extracted from the commercial documentation © J/Boats
J/Boats J/99 interior and accommodations - - 14/14
Picture extracted from the commercial documentation © J/Boats
Picture extracted from the commercial documentation © J/Boats
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