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Review of Viking


Basic specs.

sail specifications
The Viking is a sailboat designed by the Norwegian maritime architect Bjarne Aas in the late forties.

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Rig
The boat equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a genaker or a spinnaker for optimal speed.

Engine

The boat is typically equipped with an 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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Viking is 1.43, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.1 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.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Viking is about 84 kg/cm, alternatively 475 lbs/inch.
Meaning: if you load 84 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 475 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Viking is 32.8.

Low High 90% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 90% of all similar sailboat designs. This is a comfort value significantly above average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Viking is 4.73.

Wide Slim 100% 0 50 100
Compared with other similar sailboats it is slimmer than 100% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Viking is 317 which categorizes this boat among 'medium weight cruisers'.

Heavy Light 21% 0 50 100
21% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.


SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Viking with ISO 8666 reference sail is 14.1, with a 135% genua the SA/D is 15.5.

Low High 21% 0 50 100
The SA/D ratio indicates that it is faster than 21% of all similar sailboat designs in light wind.


RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Viking is 10

Slow Fast 10% 0 50 100
The relative speed performance is 10 which means that a it is faster than 10% of all similar sailboat designs.


Maintenance

Rig

Dimensions of sail for fractional rig.

mainsail specifications genoa specifications spinnaker specifications

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.



Guiding dimensions of running rig
UsageLengthDiameter
Mainsail halyard 26.3 m(86.3 feet)10 mm(3/8 inch)
Jib/genoa halyard26.3 m(86.3 feet)10 mm(3/8 inch)
Spinnaker halyard26.3 m(86.3 feet)10 mm(3/8 inch)
Jib sheet 9.5 m(31.2 feet)12 mm(1/2 inch)
Genoa sheet9.5 m(31.2 feet)12 mm(1/2 inch)
Mainsheet 23.8 m(77.9 feet)12 mm(1/2 inch)
Spinnaker sheet20.9 m(68.6 feet)12 mm(1/2 inch)
Cunningham4.0 m(13.3 feet)10 mm(3/8 inch)
Kickingstrap8.1 m(26.6 feet)10 mm(3/8 inch)
Clew-outhaul8.1 m(26.6 feet)10 mm(3/8 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.



Finally

We are always looking for new photos. If you can contribute with photos for Viking it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.



References