ROCK 20

Main

Appendages
Fin with rudder on skeg
Construction
FG
First built hull
1968
Hull type
Monohull
Last built hull
1975
Model
ROCK 20
Sailboat builder
Birka Marine
Sailboat designer
Heinz-Jurgen Sass

Dimensions

Ballast Type
Iron
Ballast weight
600.0
Beam
2.25
Displacement
1750.0
Draft
1.2
Max Draft
1.2
Overall length
7.17
Waterline length
5.95

Sails

E
2.66
Est. Forestay Length
8.27
Fore area
10.73
I
7.8
J
2.75
Mainsail area
9.42
P
7.08
Total area
20.16

Engine

Performance

Ballast ratio
34.29
Capsize Screening Formula
1.88
Comfort Ratio
20.07
Critical hull speed
5.92
Displacement-length ratio (DLR)
231.57
Upwind sail area to displacement
14.15

Accomodation

The ROCK 20 is a sailing boat designed for cruising and racing. It is a 20-foot long sailboat that offers a combination of performance, comfort, and affordability. Here are some key features and characteristics of the ROCK 20:

1. Design: The ROCK 20 is designed with a modern and sleek hull shape, optimized for speed and stability. It has a deep keel and a balanced rudder, allowing for excellent maneuverability and control.

2. Construction: The boat is typically constructed using fiberglass, which provides durability and strength while keeping the weight relatively low. This helps in enhancing the boat's performance and speed.

3. Sails and Rigging: The ROCK 20 is equipped with a fractional rig, which means that the forestay is attached below the top of the mast. This rigging configuration allows for better control and adjustment of the sails, resulting in improved performance. The boat usually comes with a mainsail, jib, and a spinnaker for downwind sailing.

4. Interior: Despite its compact size, the ROCK 20 offers a comfortable interior layout. It typically has a small cabin with basic amenities such as berths, a small galley, and a portable toilet. The cabin provides enough space for overnight stays or short cruises.

5. Performance: The ROCK 20 is known for its excellent performance on the water. It is designed to be fast and responsive, making it suitable for both racing and cruising. The boat's lightweight construction and efficient hull design contribute to its speed and agility.

6. Trailerable: One of the advantages of the ROCK 20 is its trailerability. It can be easily transported on a trailer, allowing owners to explore different sailing locations without the need for a permanent mooring.

7. Affordability: The ROCK 20 is designed to be an affordable option for sailing enthusiasts. Its relatively small size and simplified design help keep the cost down, making it accessible to a wider range of sailors.

Overall, the ROCK 20 is a versatile and well-rounded sailing boat that offers a combination of performance, comfort, and affordability. Whether you are looking to race competitively or enjoy leisurely cruises, the ROCK 20 can be a great choice.

Report error

$

currency selector