Review of SR 33

Basic specs.

The SR 33 is a sailboat designed by the maritime architect Glenn Henderson. The SR 33 is built by SR Boats.

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Hull

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.

Keel

DaggerBoard aka Sword

The SR 33 is equipped with a daggerboard keel. A daggerboard is a lifting keel that can be lowered and raised, allowing the boat to enter shallow waters as well.

The boat can enter even shallow marinas as the draft is just about 1.19 - 1.29 meter (3.90 - 4.20 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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for SR 33 is about 234 kg/cm, alternatively 1312 lbs/inch.
Meaning: if you load 234 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1312 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 SR 33 is 2.90.

Compared with other similar sailboats it is more spacy than 76% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for SR 33 is 45%.

This ballast ratio shows a righting moment that is higher than 69% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.

Over- / underrigged

The SR 33 has more rig than 99% of all similar sailboats, which indicates that the boat is significantly overrigged.

Maintenance

Rig

Dimensions of sail.

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	32.4 m	(106.3 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	32.4 m	(106.3 feet)	10 mm	(3/8 inch)
Spinnaker halyard	32.4 m	(106.3 feet)	10 mm	(3/8 inch)
Jib sheet	10.1 m	(33.1 feet)	12 mm	(1/2 inch)
Genoa sheet	10.1 m	(33.1 feet)	12 mm	(1/2 inch)
Mainsheet	25.2 m	(82.7 feet)	12 mm	(1/2 inch)
Spinnaker sheet	22.2 m	(72.8 feet)	12 mm	(1/2 inch)
Cunningham	4.7 m	(15.5 feet)	10 mm	(3/8 inch)
Kickingstrap	9.4 m	(31.0 feet)	10 mm	(3/8 inch)
Clew-outhaul	9.4 m	(31.0 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.

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Finally

We are always looking for new photos. If you can contribute with photos for SR 33 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.