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Review of Finngulf 28


Basic specs.

sail specifications
The Finngulf 28 is a sailboat designed by the Swedish maritime architect Håkan Södergren in the mid eighties. The Finngulf 28 is built by the Finnish yard Finngulf Marine.

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Hull

Both the hull and the deck is made of hand laid fibreglass. Generally, a hull made of hand laid 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 hull is a double hull which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.
The deck is a double deck which improves the indoor climate.


Interior

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, 5 berths, a galley, 70.0 liter fresh water capacity and toilet facility.


Rig

The boat has more than one rig.

One option is 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.


Keel

Fin keel

The Finngulf 28 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full 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.

Finngulf 28 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.


Engine

The boat may be equipped with an inboard Volvo Penta 2001 diesel engine at 9 hp (6 kW). The speed is 6.0 knots.

The transmission is a saildrive.

The fuel tank, which is made of stainless steel, has a capacity of 40.0 liters (10 US gallons, 8 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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Finngulf 28 is 2.08, indicating that this boat would not be accepted to participate in ocean races.


Theoretical Maximum Hull Speed

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.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Finngulf 28 is about 133 kg/cm, alternatively 747 lbs/inch.
Meaning: if you load 133 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 747 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Finngulf 28 is 18.5 - 19.5.

Low High 38% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 38% of all similar sailboat designs. This comfort value is just below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Finngulf 28 is 2.90.

Slim Wide 69% 0 50 100
Compared with other similar sailboats it is more spacy than 69% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Finngulf 28 is 42%.

Low High 58% 0 50 100
This ballast ratio shows a righting moment that is higher than 58% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Finngulf 28 is 236 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 54% 0 50 100
54% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


Maintenance

Bottom Paint

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.


Rig

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.



Guiding dimensions of running rig
Fractional rig
UsageLengthDiameter
Jib sheet 8.4 m(27.7 feet)10 mm(3/8 inch)
Genoa sheet8.4 m(27.7 feet)10 mm(3/8 inch)
Mainsheet 21.1 m(69.3 feet)10 mm(3/8 inch)
Spinnaker sheet18.6 m(61.0 feet)10 mm(3/8 inch)
Fractional rig
UsageLengthDiameter
Mainsail halyard 29.8 m(97.8 feet)8 mm(5/16 inch)
Jib/genoa halyard29.8 m(97.8 feet)8 mm(5/16 inch)
Spinnaker halyard29.8 m(97.8 feet)8 mm(5/16 inch)
Jib sheet 8.4 m(27.7 feet)10 mm(3/8 inch)
Genoa sheet8.4 m(27.7 feet)10 mm(3/8 inch)
Mainsheet 21.1 m(69.3 feet)10 mm(3/8 inch)
Spinnaker sheet18.6 m(61.0 feet)10 mm(3/8 inch)
Cunningham3.6 m(11.8 feet)8 mm(5/16 inch)
Kickingstrap7.2 m(23.6 feet)8 mm(5/16 inch)
Clew-outhaul7.2 m(23.6 feet)8 mm(5/16 inch)

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.



Finally

We are always looking for new photos. If you can contribute with photos for Finngulf 28 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.



References