Review of Cirrus
Basic specs.
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The boat can enter most marinas as the draft is just about 1.50 - 1.60 meter (4.92 - 5.22 ft) dependent on the load. See immersion rate below.
Cirrus is typically equipped with an inboard diesel engine.
The transmission is a shaft drive. A shaft drive will in the long run require less maintenence than other types of drive e.g. a sail drive.
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.
What is Capsize Screening Formula (CSF)?
The capsize screening value for Cirrus is 1.74, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Cirrus is about 176 kg/cm, alternatively 990 lbs/inch.
Meaning: if you load 176 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 990 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.
What is L/B (Length Beam Ratio)?
The l/b ratio for Cirrus is 2.93.
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): 13.38
Maintenance
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.
| Usage | Length | Diameter | ||
| Jib sheet | 8.8 m | (28.9 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.8 m | (28.9 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 22.0 m | (72.2 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 19.4 m | (63.5 feet) | 10 mm | (3/8 inch) |
This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.
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