Review of First 21.7
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 First 21.7 is equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a gennaker or a spinnaker for optimal speed.
Unknown keel type
The boat can enter even shallow marinas as the draft is just about 1.15 - 1.25 meter (3.77 - 4.07 ft) dependent on 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.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for First 21.7 is about 103 kg/cm, alternatively 581 lbs/inch.
Meaning: if you load 103 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 581 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 L/B (Length Beam Ratio)?
The l/b ratio for First 21.7 is 2.52.
Maintenance
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 | 22.1 m | (72.3 feet) | 8 mm | (5/16 inch) |
| Jib/genoa halyard | 22.1 m | (72.3 feet) | 8 mm | (5/16 inch) |
| Spinnaker halyard | 22.1 m | (72.3 feet) | 8 mm | (5/16 inch) |
| Jib sheet | 6.2 m | (20.5 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 6.2 m | (20.5 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 15.6 m | (51.3 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 13.8 m | (45.1 feet) | 10 mm | (3/8 inch) |
| Cunningham | 2.9 m | (9.4 feet) | 8 mm | (5/16 inch) |
| Kickingstrap | 5.7 m | (18.7 feet) | 8 mm | (5/16 inch) |
| Clew-outhaul | 5.7 m | (18.7 feet) | 8 mm | (5/16 inch) |
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