The First Class 10 M 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 can only enter major marinas as the draft is about 1.80 - 1.90 meter (5.91 - 6.21 ft) dependent on the load. See immersion rate below.
First Class 10 M is typically equipped with an inboard Yanmar LGM diesel engine at 6.0 hp (4 kW).
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.
The fuel tank which is made of stainless steel has a capacity of 20.0 liters (5 US gallons, 4 imperial gallons).
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 First Class 10 M is 2.06, indicating that this boat would not 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 First Class 10 M is about 215 kg/cm, alternatively 1207 lbs/inch.
Meaning: if you load 215 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1207 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 L/B (Length Beam Ratio)?
The l/b ratio for First Class 10 M is 3.62.
The ballast ratio for First Class 10 M is 32%.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for First Class 10 M with ISO 8666 reference sail is 22.6, with a 135% genua the SA/D is 26.2.
What is Relative Speed Performance?
The Relative Speed Performance for First Class 10 M is 92
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 | 31.9 m | (104.7 feet) | 12 mm | (1/2 inch) |
Jib/genoa halyard | 31.9 m | (104.7 feet) | 12 mm | (1/2 inch) |
Spinnaker halyard | 31.9 m | (104.7 feet) | 12 mm | (1/2 inch) |
Jib sheet | 10.8 m | (35.4 feet) | 14 mm | (0.55 inch) |
Genoa sheet | 10.8 m | (35.4 feet) | 14 mm | (0.55 inch) |
Mainsheet | 27.0 m | (88.6 feet) | 14 mm | (0.55 inch) |
Spinnaker sheet | 23.8 m | (78.0 feet) | 14 mm | (0.55 inch) |
Cunningham | 4.2 m | (13.9 feet) | 12 mm | (1/2 inch) |
Kickingstrap | 8.5 m | (27.9 feet) | 12 mm | (1/2 inch) |
Clew-outhaul | 8.5 m | (27.9 feet) | 12 mm | (1/2 inch) |
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