Review of Seawolf 30 (Feltham)
Basic specs.
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Both the hull and the deck 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 interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with 2 cabins, 6-7 berths, a galley, 95.0 liter fresh water capacity and toilet facility.
The Seawolf 30 (Feltham) is built 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.
The Seawolf 30 (Feltham) has been built with different keel alternatives.
Unknown keel type
The boat can enter even shallow marinas as the draft is just about 1.20 - 1.30 meter (3.94 - 4.24 ft) dependent on the load. See immersion rate below.
Fin keel
The Seawolf 30 (Feltham) is built 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.
Seawolf 30 (Feltham) can enter most marinas as the draft is just about 1.68 - 1.78 meter (5.51 - 5.81 ft) dependent on the load. See immersion rate below.
The Seawolf 30 (Feltham) has been equipped with different engine alternatives.
Alternative 1:
The boat may be equipped with an inboard Volvo Penta MD7A diesel engine at 7 hp (5 kW). Cruise speed is 4.0 knots. Max speed is 5.0 knots.
The transmission is a saildrive.
Alternative 2:
The boat may be equipped with an inboard Beta Marine diesel engine at 20 hp (14 kW). Cruise speed is 5.0 knots. Max speed is 8.0 knots.
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
The fuel tank has a capacity of 61.0 liters (16 US gallons, 13 imperial gallons).
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 Seawolf 30 (Feltham) is 2.08, indicating that this boat would not 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 Seawolf 30 (Feltham) is about 147 kg/cm, alternatively 828 lbs/inch.
Meaning: if you load 147 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 828 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 Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Seawolf 30 (Feltham) is 21.6.
What is L/B (Length Beam Ratio)?
The l/b ratio for Seawolf 30 (Feltham) is 2.88.
What is Displacement Length Ratio?
The DL-ratio for Seawolf 30 (Feltham) is 289 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 | (29.8 feet) | 12 mm | (1/2 inch) |
| Genoa sheet | 9.1 m | (29.8 feet) | 12 mm | (1/2 inch) |
| Mainsheet | 22.7 m | (74.4 feet) | 12 mm | (1/2 inch) |
| Spinnaker sheet | 20.0 m | (65.5 feet) | 12 mm | (1/2 inch) |
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