Review of Havsörnen 40
Basic specs.
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The hull is made of hand laid 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 interior is like many other boats made of mahogany. Mahogany belongs to the hardwood species, known for being water-repellent and resistant to decay. It has an attractive wood grain and holds wood polish and varnish well.
The boat is equipped with 7 berths and 180.0 liter fresh water capacity.
Fin keel
The Havsörnen 40 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 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 is typically equipped with an inboard Volvo Penta MD2B diesel engine at 25 hp (18 kW).
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
The fuel tank has a capacity of 50.0 liters (13 US gallons, 10 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.
What is Capsize Screening Formula (CSF)?
The capsize screening value for Havsörnen 40 is 1.77, 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 Havsörnen 40 is about 287 kg/cm, alternatively 1608 lbs/inch.
Meaning: if you load 287 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1608 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 Havsörnen 40 is 3.64.
The ballast ratio for Havsörnen 40 is 37%.
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 | 12.5 m | (41.0 feet) | 14 mm | (0.55 inch) |
| Genoa sheet | 12.5 m | (41.0 feet) | 14 mm | (0.55 inch) |
| Mainsheet | 31.2 m | (102.5 feet) | 14 mm | (0.55 inch) |
| Spinnaker sheet | 27.5 m | (90.2 feet) | 14 mm | (0.55 inch) |
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