Review of Vollenhovense Bol
Basic specs.
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The deck is made of steel.
The boat is equipped with 6 berths, a galley, 60.0 liter fresh water capacity and toilet facility.
Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.
Leeboard
The Vollenhovense Bol is equipped with a leeboard keel. Leeboards keels are fins on the sides of flat-bottomed hulls boats, making the keel unnecessary. Leeboards can be lowered and raised, allowing the boat to enter shallow waters as well.
Vollenhovense Bol can enter even shallow marinas as the draft is just about 0.65 - 0.75 meter (2.13 - 2.43 ft) dependent on the load. See immersion rate below.
The boat may be equipped with an inboard Volvo Penta engine at 22 hp (16 kW). The speed is 6.0 knots.
The fuel tank, which is made of steel, has a capacity of 30.0 liters (7 US gallons, 6 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 Vollenhovense Bol is 1.66, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 6.9 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 Vollenhovense Bol is about 155 kg/cm, alternatively 870 lbs/inch.
Meaning: if you load 155 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 870 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 Vollenhovense Bol is 34.6.
What is L/B (Length Beam Ratio)?
The l/b ratio for Vollenhovense Bol is 2.93.
What is Displacement Length Ratio?
The DL-ratio for Vollenhovense Bol is 299 which categorizes this boat among 'medium weight cruisers'.
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 21m2 (226 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.
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 | 8.5 m | (27.9 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.5 m | (27.9 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 21.2 m | (69.7 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 18.7 m | (61.4 feet) | 10 mm | (3/8 inch) |
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