Review of Viggen
Basic specs.
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The boat is equipped with 4 berths, a galley and toilet facility.
One option is 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.
An outboard motor is often used on this boat. In that case Viggen will typically require a power of 3 - 4 hp, alternatively 62 - 74 lbs thrust if you prefer an electrical motor. Electric outboards are becoming popular for sailboat owners who want clean instant power with less noise and no exhaust fumes.
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 Viggen is 2.03, indicating that this boat would not be accepted to participate in ocean races.
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 5.9 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Viggen is about 90 kg/cm, alternatively 506 lbs/inch.
Meaning: if you load 90 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 506 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 Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Viggen is 16.0.
What is L/B (Length Beam Ratio)?
The l/b ratio for Viggen is 3.13.
What is Displacement Length Ratio?
The DL-ratio for Viggen is 180 which categorizes this boat among 'light racers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Viggen with ISO 8666 reference sail is 14.3, with a 135% genua the SA/D is 16.7.
Maintenance
Dimensions of sail for masthead rig.
Are your sails worn out? You might find your next sail here: Sails for Sale
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.
| Masthead rig | ||||
| Usage | Length | Diameter | ||
| Mainsail halyard | 18.5 m | (60.5 feet) | 8 mm | (5/16 inch) |
| Jib/genoa halyard | 18.5 m | (60.5 feet) | 8 mm | (5/16 inch) |
| Spinnaker halyard | 18.5 m | (60.5 feet) | 8 mm | (5/16 inch) |
| Jib sheet | 7.0 m | (23.1 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 7.0 m | (23.1 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 17.6 m | (57.8 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 15.5 m | (50.9 feet) | 10 mm | (3/8 inch) |
| Cunningham | 2.7 m | (8.9 feet) | 8 mm | (5/16 inch) |
| Kickingstrap | 5.4 m | (17.7 feet) | 8 mm | (5/16 inch) |
| Clew-outhaul | 5.4 m | (17.7 feet) | 8 mm | (5/16 inch) |
| Masthead rig | ||||
| Usage | Length | Diameter | ||
| Jib sheet | 7.0 m | (23.1 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 7.0 m | (23.1 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 17.6 m | (57.8 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 15.5 m | (50.9 feet) | 10 mm | (3/8 inch) |
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