J/105

Main

Appendages
Keel : L-shaped keel (with bulb)
Category
Racer-cruiser sailboat
Construction
GRP (glass reinforced polyester): Sandwich fiberglass polyester
Country
United States
EC design category
A
First built hull
1991
Helm
Single helm wheel
Hull type
Monohull
Last built hull
-1
Model
J/105
Rudder
Single spade rudder
Sailboat builder
J/Boats
Sailboat designer
Rod Johnstone
Standard public price ex. VAT (indicative only)
N/A €
Trailerable
No
Unsinkable
No
Version
Standard

Dimensions

Ballast type
Lead
Ballast weight
1550.0
Beam
3.35
Displacement
3515.0
Draft
1.98
French customs tonnage
8.81 Tx
Hull length
10.5
Light displacement (MLC)
3515.0
Mast height from DWL
15.34
Max Draft
1.98
Overall length
10.52
Waterline length
8.99

Sails

Asymmetric spinnaker area
93.0
Downwind sail area
121.2
E
4.45
Est. Forestay Length
13.04
Fore area
25.46
I
12.37
J
4.12
Mainsail area
28.2
Mast configuration
Keel stepped mast
Number of levels of spreaders
2
P
12.65
Rigging type
Sloop Marconi fractional
Rotating spars
No
Solent area
25.4
Spars construction
Aluminum spars
Spreaders angle
Swept-back
Standing rigging
Single-strand (ROD)
Total area
53.61
Upwind sail area
53.6

Engine

Engine(s)
1 inboard engine
Engine(s) power
20.0
Engines amount
1
Fuel tank capacity
45.0
Fuel type
Diesel
Make
Yanmar

Performance

Ballast ratio
44.0
Capsize Screening Formula
2.23
Comfort Ratio
15.85
Critical hull speed
7.28
Displacement-length ratio (DLR)
137.0
Downwind sail area to displacement
52.43
Upwind sail area to displacement
23.19

Accomodation

Berth(s)
2
Berth(s) max
5
Cabin(s)
1
Cockpit
Closed aft cockpit
Freshwater tank capacity
19
Head(s)
1
Holding tank capacity
45.0

Saloon

Fore_cabin

Aft_cabin

The J/105 is a popular one-design racing sailboat that was designed by Rod Johnstone in 1991. It is a 34.5-foot (10.5 meters) keelboat that offers a combination of performance, stability, and ease of handling. The boat was specifically designed for racing, but it can also be used for cruising.

Here are some key features and characteristics of the J/105:

1. Design: The J/105 features a sleek and modern design with a low freeboard, a large cockpit, and a spacious interior. It has a high aspect ratio rig with a large mainsail and a small jib, which allows for easy handling and maneuverability.

2. Construction: The boat is built using a lightweight, high-tech construction method known as SCRIMP (Seemann Composites Resin Infusion Molding Process). This technique ensures a strong and durable hull while keeping the weight down.

3. Performance: The J/105 is known for its excellent performance on the racecourse. It has a high sail area-to-displacement ratio, a deep fin keel, and a spade rudder, which provide stability and responsiveness. The boat can reach speeds of up to 8-10 knots under sail.

4. One-Design Class: The J/105 is a strict one-design class, meaning that all boats are built to the same specifications. This ensures fair and competitive racing, as the focus is on the skill of the sailors rather than the equipment.

5. Crew Size: The boat is designed to be sailed with a crew of 4-5 people, making it accessible to a wide range of sailors. The cockpit layout and controls are optimized for efficient teamwork and quick maneuvers.

6. Cruising Comfort: While primarily designed for racing, the J/105 also offers a comfortable cruising experience. It has a simple and functional interior with basic amenities such as a small galley, a head, and sleeping accommodations for up to 4 people.

7. Class Association: The J/105 has a strong and active class association that organizes regattas, championships, and social events for owners and sailors. This fosters a sense of community and camaraderie among J/105 enthusiasts.

Overall, the J/105 is a versatile and competitive sailboat that appeals to both racing enthusiasts and those looking for a fast and enjoyable cruising experience. Its combination of performance, stability, and ease of handling has made it a popular choice among sailors worldwide.

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