Review of Hanse 531
Basic specs.
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The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.
The boat is equipped with 5-9 berths, a galley and 750.0 liter fresh water capacity.
The Hanse 531 is equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a gennaker or a spinnaker for optimal speed.
The Hanse 531 has been built with different keel alternatives.
Fin keel
One option is a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.
The boat can only enter major marinas as the draft is about 2.80 - 2.90 meter (9.19 - 9.49 ft) dependent on the load. See immersion rate below.
Fin keel
Another option is a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.
Hanse 531 can only enter major marinas as the draft is about 2.43 - 2.53 meter (7.97 - 8.27 ft) dependent on the load. See immersion rate below.
Fin keel
Another option is a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.
The boat can only enter major marinas as the draft is about 1.95 - 2.05 meter (6.40 - 6.70 ft) dependent on the load. See immersion rate below.
The Hanse 531 has been equipped with different engine alternatives.
Alternative 1:
The boat may be equipped with an inboard Yanmar 4JH3G diesel engine at 100 hp (74 kW). Calculated max speed is about 8.0 knots
Alternative 2:
Hanse 531 may be equipped with an inboard Yanmar 4JH36-HTBE diesel engine at 100 hp (74 kW). Calculated max speed is about 8.0 knots
The fuel tank has a capacity of 400.0 liters (105 US gallons, 87 imperial gallons).
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 Hanse 531 is 1.87, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
Hanse 531 holds a CE certification:
The boat is by European Union certified as Class A. OCEAN:What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 9.3 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Hanse 531 is about 480 kg/cm, alternatively 2689 lbs/inch.
Meaning: if you load 480 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 2689 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 Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Hanse 531 is 31.6.
What is L/B (Length Beam Ratio)?
The l/b ratio for Hanse 531 is 3.29.
What is Displacement Length Ratio?
The DL-ratio for Hanse 531 is 167 which categorizes this boat among 'light racers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Hanse 531 with ISO 8666 reference sail is 19.6, with a 135% genua the SA/D is 22.8.
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 84m2 (904 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.
Note: If you use a paint roller you will need more paint than if you use a paintbrush.
Dimensions of sail for fractional rig.
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.
| Usage | Length | Diameter | ||
| Mainsail halyard | 55.8 m | (183.1 feet) | 14 mm | (0.55 inch) |
| Jib/genoa halyard | 55.8 m | (183.1 feet) | 14 mm | (0.55 inch) |
| Spinnaker halyard | 55.8 m | (183.1 feet) | 14 mm | (0.55 inch) |
| Jib sheet | 16.1 m | (53.0 feet) | 16 mm | (5/8 inch) |
| Genoa sheet | 16.1 m | (53.0 feet) | 16 mm | (5/8 inch) |
| Mainsheet | 40.4 m | (132.5 feet) | 16 mm | (5/8 inch) |
| Spinnaker sheet | 35.5 m | (116.6 feet) | 16 mm | (5/8 inch) |
| Cunningham | 6.5 m | (21.3 feet) | 14 mm | (0.55 inch) |
| Kickingstrap | 13.0 m | (42.7 feet) | 14 mm | (0.55 inch) |
| Clew-outhaul | 13.0 m | (42.7 feet) | 14 mm | (0.55 inch) |
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