Review of Forgus 39
Basic specs.
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The boat is equipped with a galley.
The Forgus 39 is equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.
Fin keel
The Forgus 39 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 full keel.
The boat can only enter major marinas as the draft is about 2.10 - 2.20 meter (6.89 - 7.19 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 Forgus 39 is 1.86, 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 Forgus 39 is about 290 kg/cm, alternatively 1625 lbs/inch.
Meaning: if you load 290 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1625 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 Forgus 39 is 3.27.
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): 16.95
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 | 11.9 m | (39.0 feet) | 14 mm | (0.55 inch) |
| Genoa sheet | 11.9 m | (39.0 feet) | 14 mm | (0.55 inch) |
| Mainsheet | 29.8 m | (97.6 feet) | 14 mm | (0.55 inch) |
| Spinnaker sheet | 26.2 m | (85.9 feet) | 14 mm | (0.55 inch) |
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