Review of Westerly Seahawk 35
Basic specs.
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The hull is made of hand laid fibreglass while the deck is made of fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.
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 3 cabins, 7 berths, a galley, 240.0 liter fresh water capacity and toilet facility.
The Westerly Seahawk 35 is equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.
Fin keel
The Westerly Seahawk 35 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 keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated. As the surface of a fin type keel is just a fraction of the total wet surface, the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.
The boat can enter most marinas as the draft is just about 1.50 - 1.60 meter (4.92 - 5.22 ft) dependent on the load. See immersion rate below.
Westerly Seahawk 35 may be equipped with an inboard Perkins M30 diesel engine at 29 hp (21 kW). The 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, which is made of stainless steel, has a capacity of 140.0 liters (36 US gallons, 30 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 Westerly Seahawk 35 is 2.02, 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 7.0 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 Westerly Seahawk 35 is about 206 kg/cm, alternatively 1157 lbs/inch.
Meaning: if you load 206 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1157 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 Westerly Seahawk 35 is 26.7.
What is L/B (Length Beam Ratio)?
The l/b ratio for Westerly Seahawk 35 is 2.81.
The ballast ratio for Westerly Seahawk 35 is 45%.
What is Displacement Length Ratio?
The DL-ratio for Westerly Seahawk 35 is 326 which categorizes this boat among 'heavy 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 32m2 (344 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 | 10.5 m | (34.6 feet) | 14 mm | (0.55 inch) |
| Genoa sheet | 10.5 m | (34.6 feet) | 14 mm | (0.55 inch) |
| Mainsheet | 26.3 m | (86.5 feet) | 14 mm | (0.55 inch) |
| Spinnaker sheet | 23.2 m | (76.1 feet) | 14 mm | (0.55 inch) |
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