Review of Palmer Johnson 30 (Hughes)
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.
Full keel
The Palmer Johnson 30 (Hughes) is equipped with a long keel. A full keel provide a better directional stability than a similar boat with a fin keel; on the other hand, better directional stability means also that the boat is more difficult to handle in a harbour with less space.
The boat can enter most marinas as the draft is just about 1.62 - 1.72 meter (5.31 - 5.61 ft) dependent on the load. See immersion rate below.
The boat may be equipped with an inboard Universal engine
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 Palmer Johnson 30 (Hughes) is 1.90, indicating that this boat could - if evaluated by this formula alone - 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 6.4 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 Palmer Johnson 30 (Hughes) is about 134 kg/cm, alternatively 751 lbs/inch.
Meaning: if you load 134 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 751 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 Palmer Johnson 30 (Hughes) is 3.14.
The ballast ratio for Palmer Johnson 30 (Hughes) is 46%.
What is Displacement Length Ratio?
The DL-ratio for Palmer Johnson 30 (Hughes) is 306 which categorizes this boat among 'medium weight cruisers'.
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 23m2 (247 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 | 9.1 m | (29.9 feet) | 12 mm | (1/2 inch) |
| Genoa sheet | 9.1 m | (29.9 feet) | 12 mm | (1/2 inch) |
| Mainsheet | 22.8 m | (74.8 feet) | 12 mm | (1/2 inch) |
| Spinnaker sheet | 20.1 m | (65.8 feet) | 12 mm | (1/2 inch) |
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