Review of Alpa 21
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 Alpa 21 is built with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.
Fin keel
The Alpa 21 is built with 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 enter even shallow marinas as the draft is just about 1.22 - 1.32 meter (4.00 - 4.30 ft) dependent on the load.
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.
Sorry, we have no sailing characteristics available for this boat.
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.
The ballast ratio for Alpa 21 is 28%.
Maintenance
Dimensions of sail for masthead 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 | 21.1 m | (69.2 feet) | 8 mm | (5/16 inch) |
| Jib/genoa halyard | 21.1 m | (69.2 feet) | 8 mm | (5/16 inch) |
| Spinnaker halyard | 21.1 m | (69.2 feet) | 8 mm | (5/16 inch) |
| Jib sheet | 6.4 m | (21.0 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 6.4 m | (21.0 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 16.0 m | (52.5 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 14.1 m | (46.2 feet) | 10 mm | (3/8 inch) |
| Cunningham | 2.7 m | (9.0 feet) | 8 mm | (5/16 inch) |
| Kickingstrap | 5.5 m | (18.0 feet) | 8 mm | (5/16 inch) |
| Clew-outhaul | 5.5 m | (18.0 feet) | 8 mm | (5/16 inch) |
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