Review of Cumulant HJB 34 F

Basic specs.

The Cumulant HJB 34 F is a sailboat. The Cumulant HJB 34 F is built by the Dutch yard Harlinger Yachtbouw.

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Hull

Some boats has a hull made of Aluminium.

Interior

The boat is equipped with 6 berths.

Keel

The boat can enter most marinas as the draft is just about 1.72 - 1.82 meter (5.64 - 5.94 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 Cumulant HJB 34 F is 1.61, 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 Cumulant HJB 34 F is about 221 kg/cm, alternatively 1241 lbs/inch.
Meaning: if you load 221 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1241 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 Cumulant HJB 34 F is 3.23.

Compared with other similar sailboats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.

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): 16.27

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	10.3 m	(33.9 feet)	12 mm	(1/2 inch)
Genoa sheet	10.3 m	(33.9 feet)	12 mm	(1/2 inch)
Mainsheet	25.9 m	(84.8 feet)	12 mm	(1/2 inch)
Spinnaker sheet	22.7 m	(74.6 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.

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Finally

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References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.