Review of Joemarin 29

Basic specs.

The Joemarin 29 aka Joe 29 is a sailboat designed by the American maritime architect Britton Chance in the mid seventies.

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Interior

The boat is equipped with 6 berths, a galley and toilet facility.

Rig

The Joemarin 29 is 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.

Keel

Unknown keel type

The boat can enter most marinas as the draft is just about 1.69 - 1.79 meter (5.54 - 5.84 ft) dependent on the load. See immersion rate below.

Engine

Joemarin 29 may be equipped with an inboard Volvo Penta engine at 12 hp (8 kW).

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 Joemarin 29 is 1.83, 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 Joemarin 29 is about 167 kg/cm, alternatively 936 lbs/inch.
Meaning: if you load 167 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 936 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 Joemarin 29 is 3.07.

Compared with other similar sailboats it is more spacy than 50% of all other designs. It seems that the designer has chosen an average hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Joemarin 29 is 32%.

This ballast ratio shows a righting moment that is higher than 12% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

SA/D (Sail Area Displacement ratio)

SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 13.43

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	8.8 m	(28.7 feet)	10 mm	(3/8 inch)
Genoa sheet	8.8 m	(28.7 feet)	10 mm	(3/8 inch)
Mainsheet	21.9 m	(71.9 feet)	10 mm	(3/8 inch)
Spinnaker sheet	19.3 m	(63.2 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 Joemarin 29 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.