J/111
Sailboat specifications
The J/111 is a 36’5” (11.1m) racer-cruiser sailboat designed by Alan Johnstone (United States). She was built since 2012 (and now discontinued) by J/Boats (United States).
J/111's main features
- Model
- J/111
- Hull type
- Monohull
- Category
- Racer-cruiser sailboat
- Sailboat builder
- Sailboat designer
- Country
- United States
- Construction
- GRP (glass reinforced polyester):
Sandwich balsa fiberglass vinylester (vacuum infusion) - First built hull
- 2012
- Last built hull
- Discontinued
- Appendages
- Keel : fin with bulb
- Helm
- Single helm wheel
- Rudder
- Single spade rudder
- Unsinkable
- No
- Trailerable
- No
- EC design categoryiThe 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 - A
- Standard public price ex. VAT (indicative only)
- About165 000 €(2020)
J/111's main dimensions
- Hull length
- 36’ 5”11.1 m
- Waterline length
- 32’ 8”9.97 m
- Beam (width)
- 10’ 10”3.29 m
- Draft
- 7’ 2”2.19 m
- Mast height from DWL
- 55’ 2”16.84 m
- Light displacement (MLC)
- 9295 lb4216 kg
- Ballast weight
- 3514 lb1594 kg
- Ballast type
- Cast iron fin with lead bulb
J/111's rig and sails
- Upwind sail area
- 753 ft²70 m²
- Downwind sail area
- 1798 ft²167 m²
- Mainsail area
- 398 ft²37 m²
- Genoa area
- 355 ft²33 m²
- Asymmetric spinnaker area
- 1399 ft²130 m²
- IiFore triangle height (from mast foot to fore stay top attachment)
- 48’ 5”14.74 m
- JiFore triangle base (from mast foot to bottom of forestay)
- 13’ 10”4.22 m
- PiMainsail hoist measurement (from tack to head)
- 45’ 2”13.77 m
- EiMainsail foot measurement (from tack to clew)
- 14’ 6”4.42 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
- Carbon fiber mast and aluminum boom
- Standing rigging
- Single-strand (ROD)
J/111'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. - 289 ft²/T26.82 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. - 689 ft²/T63.99 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. - 120
- 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. - 38 %
- 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. - 7.66 knots
J/111's auxiliary engine
- Engine(s)
- 1 inboard engine
- Engine(s) power
- 21 HP
- Fuel type
- Diesel
- Fuel tank capacity
- 18.5 gal70 liters
J/111's accommodations and layout
- Cockpit
- Open aft cockpit
- Cabin(s)
- 1
- Berth(s) (min./max.)
- 6 / 8
- Head(s)
- 1
- Freshwater tank capacity
- 26.4 gal100 liters
- Holding tank capacity
- 11.9 gal45 liters
- Maximum headroom
- 5’ 11”1.8 m
J/Boats J/111 interior and accommodations - - 13/14
Picture extracted from the commercial documentation © J/Boats
Picture extracted from the commercial documentation © J/Boats
J/Boats J/111 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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