Review of Finngulf 36

Basic specs.

The Finngulf 36 is a sailboat designed by the Swedish maritime architect Håkan Södergren in the early nineties.

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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.

Both the hull and the deck is a sandwich construction 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.

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 3 cabins, 6-7 berths, a galley, 100.0 liter fresh water capacity and toilet facility.

Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.

Rig

Finngulf 36 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 36 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 lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

The boat can only enter major marinas as the draft is about 1.98 - 2.08 meter (6.50 - 6.80 ft) dependent on the load. See immersion rate below.

Engine

The boat may be equipped with an inboard Volvo Penta 2002 diesel engine at 18 hp (13 kW). The speed is 7.0 knots.

The transmission is a saildrive.

The fuel tank, which is made of stainless steel, has a capacity of 75.0 liters (19 US gallons, 16 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 36 is 1.84, indicating that this boat could - if evaluated by this formula alone - 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 7.1 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 36 is about 190 kg/cm, alternatively 1067 lbs/inch.
Meaning: if you load 190 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1067 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 36 is 27.8.

Comparing this ratio with similar sailboats show that it is more comfortable than 54% of all similar sailboat designs. This comfort value is just above average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Finngulf 36 is 3.30.

Compared with other similar sailboats it is slimmer than 62% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Finngulf 36 is 39%.

This ballast ratio shows a righting moment that is higher than 46% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Finngulf 36 is 262 which categorizes this boat among 'light crusers & offshore racers'.

46% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.

SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Finngulf 36 with ISO 8666 reference sail is 17.7, with a 135% genua the SA/D is 20.5.

The SA/D ratio indicates that it is faster than 62% of all similar sailboat designs in light wind.

Over- / underrigged

The Finngulf 36 has more rig than 58% of all similar sailboats, which indicates that the boat is slightly overrigged.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Finngulf 36 is 76

The relative speed performance is 76 which means that a it is faster than 76% of all similar sailboat designs.

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 34m² (365 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

Dimensions of sail for fractional rig.

Are your sails worn out? You might find your next sail here: Sails for Sale

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
Usage	Length		Diameter
Mainsail halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Spinnaker halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Jib sheet	10.9 m	(35.9 feet)	14 mm	(0.55 inch)
Genoa sheet	10.9 m	(35.9 feet)	14 mm	(0.55 inch)
Mainsheet	27.3 m	(89.6 feet)	14 mm	(0.55 inch)
Spinnaker sheet	24.0 m	(78.9 feet)	14 mm	(0.55 inch)
Cunningham	4.5 m	(14.8 feet)	12 mm	(1/2 inch)
Kickingstrap	9.0 m	(29.5 feet)	12 mm	(1/2 inch)
Clew-outhaul	9.0 m	(29.5 feet)	12 mm	(1/2 inch)
Fractional rig
Usage	Length		Diameter
Mainsail halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Spinnaker halyard	36.8 m	(120.7 feet)	12 mm	(1/2 inch)
Jib sheet	10.9 m	(35.9 feet)	14 mm	(0.55 inch)
Genoa sheet	10.9 m	(35.9 feet)	14 mm	(0.55 inch)
Mainsheet	27.3 m	(89.6 feet)	14 mm	(0.55 inch)
Spinnaker sheet	24.0 m	(78.9 feet)	14 mm	(0.55 inch)
Cunningham	4.5 m	(14.8 feet)	12 mm	(1/2 inch)
Kickingstrap	9.0 m	(29.5 feet)	12 mm	(1/2 inch)
Clew-outhaul	9.0 m	(29.5 feet)	12 mm	(1/2 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Finngulf 36 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

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.