The Tocas 31 is equipped with 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 keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated. As the surface of a fin type keel is just a fraction of the total wet surface, the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.
The boat is typically equipped with an inboard Volvo Penta MB10A engine at 15.0 hp (11 kW), which gives a max speed about 5.2 knots.
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 Tocas 31 is 1.98, 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 6.6 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 Tocas 31 is about 148 kg/cm, alternatively 832 lbs/inch.
Meaning: if you load 148 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 832 lbs cargo on the boat it will sink 1 inch.
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 Tocas 31 is 21.0.
What is L/B (Length Beam Ratio)?
The l/b ratio for Tocas 31 is 3.20.
The ballast ratio for Tocas 31 is 47%.
What is Displacement Length Ratio?
The DL-ratio for Tocas 31 is 224 which categorizes this boat among 'light crusers & offshore racers'.
What is Relative Speed Performance?
The Relative Speed Performance for Tocas 31 is 46
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 | 9.5 m | (31.0 feet) | 12 mm | (1/2 inch) |
Genoa sheet | 9.5 m | (31.0 feet) | 12 mm | (1/2 inch) |
Mainsheet | 23.7 m | (77.6 feet) | 12 mm | (1/2 inch) |
Spinnaker sheet | 20.8 m | (68.3 feet) | 12 mm | (1/2 inch) |
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