Review of Schelinkrydser

Basic specs.

The Schelinkrydser also known as Schelinkryssare or Schelinkryssare is a sailboat designed by the maritime architect Oscar Schelin. The Schelinkrydser is built by the Swedish yard Kungsörs Båtvarv AB.

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Rig

Rig of Schelinkrydser anno 1977.

The Schelinkrydser 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.

Keel

Keel of Schelinkrydser anno 1977.

Unknown keel type

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 enter even shallow marinas as the draft is just about 1.42 - 1.52 meter (4.66 - 4.96 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 Schelinkrydser is 1.66, 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 6.6 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 Schelinkrydser is about 134 kg/cm, alternatively 755 lbs/inch.
Meaning: if you load 134 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 755 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 Schelinkrydser is 30.2.

Comparing this ratio with similar sailboats show that it is more comfortable than 73% 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 Schelinkrydser is 3.86.

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 Schelinkrydser is 47%.

This ballast ratio shows a righting moment that is higher than 82% 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 Schelinkrydser is 309 which categorizes this boat among 'medium weight cruisers'.

24% 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 Schelinkrydser with ISO 8666 reference sail is 16.4, with a 135% genua the SA/D is 19.4.

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

Over- / underrigged

The Schelinkrydser has more rig than 73% 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 Schelinkrydser is 10

The relative speed performance is 10 which means that a it is faster than 10% 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 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

Dimensions of sail for masthead 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	29.1 m	(95.3 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	29.1 m	(95.3 feet)	10 mm	(3/8 inch)
Spinnaker halyard	29.1 m	(95.3 feet)	10 mm	(3/8 inch)
Jib sheet	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Genoa sheet	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Mainsheet	26.2 m	(86.1 feet)	12 mm	(1/2 inch)
Spinnaker sheet	23.1 m	(75.8 feet)	12 mm	(1/2 inch)
Cunningham	3.7 m	(12.1 feet)	10 mm	(3/8 inch)
Kickingstrap	7.4 m	(24.3 feet)	10 mm	(3/8 inch)
Clew-outhaul	7.4 m	(24.3 feet)	10 mm	(3/8 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 Schelinkrydser 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.