The **J/11S** is a 35’10” (10.9m) cruiser-racer sailboat designed by *Alan Johnstone* (United States). She was built between 2016 and 2019 by *J/Boats* (United States).

- Model
- J/11S
- Hull type
- Monohull
- Category
- Cruiser-racer sailboat
- Sailboat builder
- Sailboat designer
- Country
- United States
- Construction
- GRP (glass reinforced polyester):

Sandwich fiberglass polyester - First built hull
- 2016
- Last built hull
- 2019
- Appendages
- Keel : fin with bulb
- Helm
- Single tiller
- Rudder
- Twin spade rudders
- Unsinkable
- No
- Trailerable
- No
- 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 - A
- Standard public price ex. VAT (indicative only)
- About165 000 €(2017)

- Hull length
- 35’ 10”10.9 m
- Waterline length
- 32’ 11”10.04 m
- Beam (width)
- 10’ 11”3.31 m
- Draft
- 7’ 2”2.2 m
- Light displacement (M
_{LC}) - 10141 lb4600 kg
- Ballast weight
- 3461 lb1570 kg

- Upwind sail area
- 678 ft²63 m²
- Downwind sail area
- 1023 ft²95 m²
- Symmetric spinnaker area
- 1023 ft²95 m²
- 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
- Dyform

- 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. - 245 ft²/T22.78 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. - 370 ft²/T34.35 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. - 129
- 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. - 34 %
- 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. - 7.69 knots

- Engine(s)
- 1 inboard engine
- Engine(s) power
- 18 HP
- Fuel type
- Diesel
- Fuel tank capacity
- 13.2 gal50 liters

- Cockpit
- Open aft cockpit
- Cabin(s)
- 3
- Berth(s) (min./max.)
- 6 / 8
- Head(s)
- 1
- Freshwater tank capacity
- 26.4 gal100 liters

Sailboats

First built hull

Hull length

2003

33’ 2”10.11 m

2009

31’ 2”9.51 m

2015

36’ 1”10.99 m

2003

31’ 6”9.6 m

2017

32’9.75 m

2017

40’12.2 m

2016

34’ 10”10.6 m

2013

29’ 2”8.9 m

2009

31’ 8”9.65 m

2011

34’ 10”10.6 m

1997

31’ 2”9.5 m

2012

36’ 1”10.99 m

2012

36’ 5”11.1 m

2011

36’10.98 m

2012

37’ 1”11.3 m