Review of Impala 57
Basic specs.
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The hull is made of aluminium. Aluminum is strong and forgiving. Where an impact on a fiberglass hull will result in major gelcoat damage and possible cracking, an aluminum hull will probably only have a scratch or a small bend. The only concern is electrolysis. Ensure that you have proper sacrificial anodes installed.
The boat is equipped with 9 berths and 950.0 liter fresh water capacity.
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 Impala 57 is 2.00, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
Impala 57 holds a CE certification:
The boat is by European Union certified as Class A. OCEAN:What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 9.4 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 Impala 57 is about 514 kg/cm, alternatively 2881 lbs/inch.
Meaning: if you load 514 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 2881 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 Impala 57 is 3.43.
What is Displacement Length Ratio?
The DL-ratio for Impala 57 is 139 which categorizes this boat among 'ultra light racers'.
Maintenance
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 | 17.5 m | (57.4 feet) | 16 mm | (5/8 inch) |
| Genoa sheet | 17.5 m | (57.4 feet) | 16 mm | (5/8 inch) |
| Mainsheet | 43.8 m | (143.5 feet) | 16 mm | (5/8 inch) |
| Spinnaker sheet | 38.5 m | (126.3 feet) | 16 mm | (5/8 inch) |
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