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Review of Shamrock Golden

Shamrock Golden
Shamrock Golden anno 1977.

Basic specs.

sail specifications
The Shamrock Golden is a sailboat designed by the New Zealander maritime architect Ron Holland.

Looking for a new boat? Find a Shamrock Golden or similar boat for sale

Keel
Keel
Keel of Shamrock Golden. Shamrock Golden 31

The boat can only enter major marinas as the draft is about 1.84 - 1.94 meter (6.04 - 6.34 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 Golden is 2.01, indicating that this boat would not 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 Golden is about 186 kg/cm, alternatively 1044 lbs/inch.
Meaning: if you load 186 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1044 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 Golden is 2.92.

Slim Wide 69% 0 50 100
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 Golden is 41%.

Low High 50% 0 50 100
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!


RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Shamrock Golden is 62

Slow Fast 62% 0 50 100
The relative speed performance is 62 which means that a it is faster than 62% 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
UsageLengthDiameter
Jib sheet 9.0 m(29.6 feet)12 mm(1/2 inch)
Genoa sheet9.0 m(29.6 feet)12 mm(1/2 inch)
Mainsheet 22.5 m(73.9 feet)12 mm(1/2 inch)
Spinnaker sheet19.8 m(65.0 feet)12 mm(1/2 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 Shamrock Golden 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.