Review of Jongert 20s
Basic specs.
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The Jongert 20s is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel.
The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.
The boat can only enter major marinas as the draft is about 3.00 - 3.10 meter (9.84 - 10.14 ft) dependent on the load. See immersion rate below.
Jongert 20s is typically equipped with an inboard Mercedes-Benz diesel engine.
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 Jongert 20s is 1.43, indicating that this boat could - if evaluated by this formula alone - 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 Jongert 20s is about 748 kg/cm, alternatively 4193 lbs/inch.
Meaning: if you load 748 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 4193 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 Jongert 20s is 3.83.
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): 15.82
Sorry, we do not have sufficient statistical information available for this boat to provide a significant reliable analysis.
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 | 20.7 m | (67.9 feet) | 16 mm | (5/8 inch) |
| Genoa sheet | 20.7 m | (67.9 feet) | 16 mm | (5/8 inch) |
| Mainsheet | 51.8 m | (169.8 feet) | 16 mm | (5/8 inch) |
| Spinnaker sheet | 45.5 m | (149.4 feet) | 16 mm | (5/8 inch) |
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