Review of JoJ:20
Basic specs.
Looking for a new boat? Find a JoJ:20 or similar boat for sale
The interior is like many other boats made of mahogany. Mahogany belongs to the hardwood species, known for being water-repellent and resistant to decay. It has an attractive wood grain and holds wood polish and varnish well.
The boat is equipped with 4 berths and a galley.
Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.
Unknown keel type
JoJ:20 can enter even shallow marinas as the draft is just about 1.15 - 1.25 meter (3.77 - 4.07 ft) dependent on the load. See immersion rate below.
Sailing characteristics
This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.
What is Capsize Screening Formula (CSF)?
The capsize screening value for JoJ:20 is 2.48, indicating that this boat would not be accepted to participate in ocean races.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for JoJ:20 is about 91 kg/cm, alternatively 514 lbs/inch.
Meaning: if you load 91 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 514 lbs cargo on the boat it will sink 1 inch.
Sailing statistics
This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.
What is L/B (Length Beam Ratio)?
The l/b ratio for JoJ:20 is 2.59.
SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 18.57
Maintenance
If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.
| Usage | Length | Diameter | ||
| Jib sheet | 6.0 m | (19.6 feet) | 8 mm | (5/16 inch) |
| Genoa sheet | 6.0 m | (19.6 feet) | 8 mm | (5/16 inch) |
| Mainsheet | 14.9 m | (48.9 feet) | 8 mm | (5/16 inch) |
| Spinnaker sheet | 13.1 m | (43.0 feet) | 8 mm | (5/16 inch) |
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