Review of Najad 505
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.
The boat is equipped with 6-8 berths and 800.0 liter fresh water capacity.
The Najad 505 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.
Fin keel
The Najad 505 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 boat can only enter major marinas as the draft is about 2.45 - 2.55 meter (8.04 - 8.34 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.
What is Capsize Screening Formula (CSF)?
The capsize screening value for Najad 505 is 1.77, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
Najad 505 holds a CE certification:
The boat is by European Union certified as Class A. OCEAN:The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Najad 505 is about 470 kg/cm, alternatively 2634 lbs/inch.
Meaning: if you load 470 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 2634 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 Najad 505 is 3.33.
The ballast ratio for Najad 505 is 33%.
SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 19.60
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 | 15.3 m | (50.2 feet) | 16 mm | (5/8 inch) |
| Genoa sheet | 15.3 m | (50.2 feet) | 16 mm | (5/8 inch) |
| Mainsheet | 38.2 m | (125.5 feet) | 16 mm | (5/8 inch) |
| Spinnaker sheet | 33.7 m | (110.4 feet) | 16 mm | (5/8 inch) |
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