Review of Folkebåd

Folkebåd.

Basic specs.

The Folkebåd aka Marieholm 26 or Folkboat aka Folkboat is a small sailboat designed by the Swedish maritime architect Tord Arne Sundén in the early forties. Several thousand boats have been produced. The Folkebåd is built by the Danish yard Folkebådscentralen AS.

Looking for a new boat? Find a Folkebåd or similar boat for sale

Hull

The hull is made of wood.
Some boats has a hull made of Fibreglass.

Interior

The boat is equipped with 4 berths.

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

Cockpit

Cockpit of Folkebåd anno 1959.

Rig

Rig of Folkebåd.

The Folkebåd is equipped 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.

Keel

Unknown keel type

Folkebåd 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.

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 Folkebåd is 1.77, 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 5.9 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 Folkebåd is about 88 kg/cm, alternatively 495 lbs/inch.
Meaning: if you load 88 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 495 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 Folkebåd is 22.4.

Comparing this ratio with similar sailboats show that it is more comfortable than 79% of all similar sailboat designs. This is a comfort value significantly above average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Folkebåd is 3.47.

Compared with other similar sailboats it is slimmer than 96% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Folkebåd is 54%.

This ballast ratio shows a righting moment that is higher than 95% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Folkebåd is 252 which categorizes this boat among 'light crusers & offshore racers'.

38% 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 Folkebåd with ISO 8666 reference sail is 16.4, with a 135% genua the SA/D is 18.8.

The SA/D ratio indicates that it is faster than 46% of all similar sailboat designs in light wind.

Over- / underrigged

The Folkebåd has more rig than 50% of all similar sailboats, which indicates that this rig is spot on average!

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Folkebåd is 34

The relative speed performance is 34 which means that a it is faster than 34% 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 15m² (161 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**
Usage	Length		Diameter
Mainsail halyard	23.1 m	(75.8 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	23.1 m	(75.8 feet)	8 mm	(5/16 inch)
Spinnaker halyard	23.1 m	(75.8 feet)	8 mm	(5/16 inch)
Jib sheet	7.6 m	(25.1 feet)	10 mm	(3/8 inch)
Genoa sheet	7.6 m	(25.1 feet)	10 mm	(3/8 inch)
Mainsheet	19.1 m	(62.7 feet)	10 mm	(3/8 inch)
Spinnaker sheet	16.8 m	(55.1 feet)	10 mm	(3/8 inch)
Cunningham	3.4 m	(11.2 feet)	8 mm	(5/16 inch)
Kickingstrap	6.8 m	(22.4 feet)	8 mm	(5/16 inch)
Clew-outhaul	6.8 m	(22.4 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 Folkebåd 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.