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Review of Wasa 370


Wasa 370
Wasa 370.

Basic specs.

sail specifications
The Wasa 370 aka Wasa 360 is a sailboat designed by the maritime architect Leif Ängermark in the mid eighties. The Wasa 370 is built by the Swedish yard Wasa Yachts.

Looking for a new boat? Find a Wasa 370 or similar boat for sale

Hull

The hull is made of hand laid fibreglass while the deck is made of fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.
The hull is a double hull which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.
The deck is a double deck which improves the indoor climate.


Interior
Floor plan
Floor plan of Wasa 370.
Interior
Interior of Wasa 370.

The interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with 6 berths, a galley, 120.0 liter fresh water capacity and toilet facility.

Chart table
Chart table of Wasa 370.
Galley
Galley of Wasa 370.

Rig
Rig
Rig of Wasa 370.

The Wasa 370 is 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 gennaker or a spinnaker for optimal speed.


Keel

Fin keel

The Wasa 370 is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than 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 1.95 - 2.05 meter (6.40 - 6.70 ft) dependent on the load. See immersion rate below.


Engine

Wasa 370 may be equipped with an inboard Volvo Penta MD2030 diesel engine at 30 hp (22 kW). Calculated max speed is about 6.5 knots

The fuel tank, which is made of stainless steel, has a capacity of 120.0 liters (31 US gallons, 26 imperial gallons).


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 Wasa 370 is 1.88, 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 7.3 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 Wasa 370 is about 197 kg/cm, alternatively 1103 lbs/inch.
Meaning: if you load 197 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1103 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 Wasa 370 is 24.1.

Low High 31% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 31% of all similar sailboat designs. This comfort value is just below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Wasa 370 is 3.46.

Wide Slim 76% 0 50 100
Compared with other similar sailboats it is slimmer than 76% of all other designs. It seems that the designer has chosen a significantly more speedy hull design.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Wasa 370 is 199 which categorizes this boat among 'light racers'.

Heavy Light 73% 0 50 100
73% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


SA/D (Sail Area Displacement ratio)

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

The SA/D for Wasa 370 with ISO 8666 reference sail is 18.3, with a 135% genua the SA/D is 21.3.

Low High 66% 0 50 100
The SA/D ratio indicates that it is faster than 66% of all similar sailboat designs in light wind.


RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Wasa 370 is 73

Slow Fast 73% 0 50 100
The relative speed performance is 73 which means that a it is faster than 73% of all similar sailboat designs.


Maintenance

Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 35m2 (376 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.


Rig

Dimensions of sail for fractional rig.

mainsail specifications headsail 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 36.2 m(118.7 feet)12 mm(1/2 inch)
Jib/genoa halyard36.2 m(118.7 feet)12 mm(1/2 inch)
Spinnaker halyard36.2 m(118.7 feet)12 mm(1/2 inch)
Jib sheet 11.2 m(36.8 feet)14 mm(0.55 inch)
Genoa sheet11.2 m(36.8 feet)14 mm(0.55 inch)
Mainsheet 28.1 m(92.1 feet)14 mm(0.55 inch)
Spinnaker sheet24.7 m(81.1 feet)14 mm(0.55 inch)
Cunningham4.2 m(13.8 feet)12 mm(1/2 inch)
Kickingstrap8.4 m(27.6 feet)12 mm(1/2 inch)
Clew-outhaul8.4 m(27.6 feet)12 mm(1/2 inch)

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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



Finally

We are always looking for new photos. If you can contribute with photos for Wasa 370 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