Review of Marieholm 261

Marieholm 261 anno 1986. Marieholm 261 nr. 555 1986

Basic specs.

The Marieholm 261 is a sailboat designed by the Swedish maritime architect Tord Arne Sundén in the early eighties. Less than 100 boats have been produced. The Marieholm 261 is built by the Swedish yard Marieholm Plast AB.

Looking for a new boat? Find a Marieholm 261 or similar boat for sale

Hull

The hull is made of fibreglass. Generally, 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 4 berths.

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.

Keel

Keel of Marieholm 261 anno 1986. Marieholm 261 nr. 555 1986

Engine

The boat is typically equipped with an inboard Yanmar 1GM10 diesel engine at 9.0 hp (6 kW), which gives a max speed about 4.2 knots.

The transmission is a shaft drive. A shaft drive will in the long run require less maintenence 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 Marieholm 261 is 1.69, 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 6.0 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 Marieholm 261 is about 94 kg/cm, alternatively 530 lbs/inch.
Meaning: if you load 94 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 530 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 Marieholm 261 is 27.2.

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 Marieholm 261 is 3.45.

Compared with other similar sailboats it is slimmer than 95% 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 Marieholm 261 is 311 which categorizes this boat among 'medium weight cruisers'.

18% 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 Marieholm 261 with ISO 8666 reference sail is 13.5, with a 135% genua the SA/D is 15.4.

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 Marieholm 261 is 18

The relative speed performance is 18 which means that a it is faster than 18% of all similar sailboat designs.

Maintenance

Rig

Dimensions of sail for fractional 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	23.2 m	(76.0 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	23.2 m	(76.0 feet)	8 mm	(5/16 inch)
Spinnaker halyard	23.2 m	(76.0 feet)	8 mm	(5/16 inch)
Jib sheet	7.9 m	(26.0 feet)	10 mm	(3/8 inch)
Genoa sheet	7.9 m	(26.0 feet)	10 mm	(3/8 inch)
Mainsheet	19.9 m	(65.1 feet)	10 mm	(3/8 inch)
Spinnaker sheet	17.5 m	(57.3 feet)	10 mm	(3/8 inch)
Cunningham	3.4 m	(11.2 feet)	8 mm	(5/16 inch)
Kickingstrap	6.8 m	(22.3 feet)	8 mm	(5/16 inch)
Clew-outhaul	6.8 m	(22.3 feet)	8 mm	(5/16 inch)

Boat owner's ideas

This section is reserved boat owner's changes, 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 Marieholm 261 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.