Review of Offshore 26

Basic specs.

The Offshore 26 is a sailboat designed by the Swedish maritime architect Tord Arne Sundén together with Cheoy Lee from in the late fifties.

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Hull

The hull is made of wood.

Rig

The boat equipped with a masthead rig. 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.

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 Offshore 26 is 2.14, indicating that this boat would not 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 6.5 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 Offshore 26 is about 127 kg/cm, alternatively 715 lbs/inch.
Meaning: if you load 127 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 715 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 Offshore 26 is 15.8.

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 Offshore 26 is 2.90.

Compared with other similar sailboats it is more spacy than 62% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Offshore 26 is 159 which categorizes this boat among 'light racers'.

79% 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 Offshore 26 with ISO 8666 reference sail is 19.3, with a 135% genua the SA/D is 22.6.

The SA/D ratio indicates that it is faster than 82% of all similar sailboat designs in light wind.

Maintenance

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	23.0 m	(75.5 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	23.0 m	(75.5 feet)	8 mm	(5/16 inch)
Spinnaker halyard	23.0 m	(75.5 feet)	8 mm	(5/16 inch)
Jib sheet	7.8 m	(25.6 feet)	10 mm	(3/8 inch)
Genoa sheet	7.8 m	(25.6 feet)	10 mm	(3/8 inch)
Mainsheet	19.5 m	(64.0 feet)	10 mm	(3/8 inch)
Spinnaker sheet	17.2 m	(56.3 feet)	10 mm	(3/8 inch)
Cunningham	3.5 m	(11.5 feet)	8 mm	(5/16 inch)
Kickingstrap	7.0 m	(23.0 feet)	8 mm	(5/16 inch)
Clew-outhaul	7.0 m	(23.0 feet)	8 mm	(5/16 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 Offshore 26 (Sundén) 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.