Review of Vindö 40

Basic specs.

The Vindö 40 is a sailboat designed by the Swedish maritime architect Carl Andersson together with John Henrik Volter Lindblom also from Sweden in the early seventies. Several hundred boats have been built. The Vindö 40 is built by the Swedish yard Nötesunds Varv AB.

Teak deck

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Hull

The hull is made of fibreglass. A hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

Interior

The boat is equipped with 5-6 berths and 150 liters (39 US gallons, 32 imperial gallons) fresh water capacity.

The headroom is above average

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.

Rig

The Vindö 40 is built with a masthead rig. The sail area for the mailsail + jib is 40.6 m² (437.0 ft²). 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.

Keel

Full keel

The Vindö 40 is built with a long keel. A long keel provide a better directional stability than a similar boat with a fin keel; on the other hand, better directional stability means also that the boat is more difficult to handle in a harbour with less space.

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 enter even shallow marinas as the draft is just about 1.40 - 1.50 meter (4.59 - 4.89 ft) dependent on the load. See immersion rate below.

Engine

The fuel tank has a capacity of 50 liters (13 US gallons, 10 imperial gallons).

The Vindö 40 has been equipped with different engine alternatives.

Alternative 1:

Vindö 40 may be equipped with an inboard Volvo Penta MD2B diesel engine at 25 hp (18 kW). The speed is 7.0 knots.

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.

Alternative 2:

The boat may be equipped with an inboard Volvo Penta MD11C diesel engine at 23 hp (17 kW). Calculated max speed is about 5.2 knots

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.

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 Vindö 40 is 1.72, 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 6.6 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 Vindö 40 is about 148 kg/cm, alternatively 830 lbs/inch.
Meaning: if you load 148 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 830 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 Vindö 40 is 28.6 - 32.3.

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 Vindö 40 is 3.19.

Compared with other similar sailboats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Vindö 40 is 41%.

This ballast ratio shows a righting moment that is higher than 50% of all similar sailboat designs. This righting moment (ability to resist heeling) is spot on average!

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Vindö 40 is 323 which categorizes this boat among 'medium weight cruisers'.

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 Vindö 40 with ISO 8666 reference sail is 13.4, with a 135% genua the SA/D is 16.0.

The SA/D ratio indicates that it is faster than 15% of all similar sailboat designs in light wind.

Over- / underrigged

The Vindö 40 has more rig than 58% of all similar sailboats, which indicates that the boat is slightly overrigged.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Vindö 40 is 14

The relative speed performance is 14 which means that a it is faster than 14% 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 24m² (258 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 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.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Mainsail halyard	26.4 m	(86.7 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	26.4 m	(86.7 feet)	10 mm	(3/8 inch)
Spinnaker halyard	26.4 m	(86.7 feet)	10 mm	(3/8 inch)
Jib sheet	9.4 m	(30.8 feet)	12 mm	(1/2 inch)
Genoa sheet	9.4 m	(30.8 feet)	12 mm	(1/2 inch)
Mainsheet	23.5 m	(77.1 feet)	12 mm	(1/2 inch)
Spinnaker sheet	20.7 m	(67.8 feet)	12 mm	(1/2 inch)
Cunningham	3.5 m	(11.6 feet)	10 mm	(3/8 inch)
Kickingstrap	7.1 m	(23.2 feet)	10 mm	(3/8 inch)
Clew-outhaul	7.1 m	(23.2 feet)	10 mm	(3/8 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 Vindö 40 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

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.