Review of Alerion Express 19
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. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.
The Alerion Express 19 is equipped with a cat rig. A cat rig (also called an una rig) is simple to manage as there is no standing rigging, often referred to as “unstayed”. With only one sail it can be single-handed quite easily. The downside is its upwind performance.
CentreBoard
The Alerion Express 19 is equipped with a centreboard keel. A centreboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.
The boat can sail close to the beach as the draft is just 0.30 - 0.40 meter (0.98 - 1.28 ft) dependent of the load. See immersion rate below.
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 Alerion Express 19 is 2.87, indicating that this boat would not 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 5.8 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 Alerion Express 19 is about 102 kg/cm, alternatively 571 lbs/inch.
Meaning: if you load 102 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 571 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 Alerion Express 19 is 8.0.
What is L/B (Length Beam Ratio)?
The l/b ratio for Alerion Express 19 is 2.21.
The ballast ratio for Alerion Express 19 is 17%.
What is Displacement Length Ratio?
The DL-ratio for Alerion Express 19 is 115 which categorizes this boat among 'ultra light racers'.
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 17m2 (182 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 | 5.8 m | (19.2 feet) | 8 mm | (5/16 inch) |
| Genoa sheet | 5.8 m | (19.2 feet) | 8 mm | (5/16 inch) |
| Mainsheet | 14.6 m | (47.9 feet) | 8 mm | (5/16 inch) |
| Spinnaker sheet | 12.8 m | (42.2 feet) | 8 mm | (5/16 inch) |
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