Review of Shamrock Clubracer

Basic specs.

The Shamrock Clubracer is a sailboat designed by the New Zealander maritime architect Ron Holland.

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Keel

Unknown keel type

The boat can only enter major marinas as the draft is about 1.81 - 1.91 meter (5.94 - 6.24 ft) dependent on the load. See immersion rate below.

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 Shamrock Clubracer is 1.99, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Shamrock Clubracer is about 187 kg/cm, alternatively 1050 lbs/inch.
Meaning: if you load 187 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1050 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.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Shamrock Clubracer is 2.91.

Compared with other similar sailboats it is more spacy than 69% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Shamrock Clubracer is 38%.

This ballast ratio shows a righting moment that is higher than 34% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Shamrock Clubracer is 86

The relative speed performance is 86 which means that a it is faster than 86% of all similar sailboat designs.

Maintenance

Rig

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
Jib sheet	9.0 m	(29.6 feet)	12 mm	(1/2 inch)
Genoa sheet	9.0 m	(29.6 feet)	12 mm	(1/2 inch)
Mainsheet	22.6 m	(74.1 feet)	12 mm	(1/2 inch)
Spinnaker sheet	19.9 m	(65.2 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 Shamrock Clubracer 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.