Review of Kings Cruiser 28

Basic specs.

The Kings Cruiser 28 is a sailboat designed by the Swedish maritime architect Tord Arne Sundén in the mid fifties. Several hundred boats have been produced.

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Hull

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

Rig

The boat 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 genaker or a spinnaker for optimal speed.

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 Kings Cruiser 28 is 1.69, 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 5.8 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 Kings Cruiser 28 is about 85 kg/cm, alternatively 480 lbs/inch.
Meaning: if you load 85 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 480 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 Kings Cruiser 28 is 25.6.

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 Kings Cruiser 28 is 3.86.

Compared with other similar sailboats it is slimmer than 99% 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'.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Kings Cruiser 28 is 330 which categorizes this boat among 'heavy cruisers'.

15% 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 Kings Cruiser 28 with ISO 8666 reference sail is 16.4, with a 135% genua the SA/D is 19.2.

The SA/D ratio indicates that it is faster than 54% of all similar sailboat designs in light wind.

Maintenance

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	23.4 m	(76.8 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	23.4 m	(76.8 feet)	8 mm	(5/16 inch)
Spinnaker halyard	23.4 m	(76.8 feet)	8 mm	(5/16 inch)
Jib sheet	8.5 m	(28.0 feet)	10 mm	(3/8 inch)
Genoa sheet	8.5 m	(28.0 feet)	10 mm	(3/8 inch)
Mainsheet	21.3 m	(70.0 feet)	10 mm	(3/8 inch)
Spinnaker sheet	18.8 m	(61.6 feet)	10 mm	(3/8 inch)
Cunningham	3.4 m	(11.0 feet)	8 mm	(5/16 inch)
Kickingstrap	6.7 m	(22.0 feet)	8 mm	(5/16 inch)
Clew-outhaul	6.7 m	(22.0 feet)	8 mm	(5/16 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for Kings Cruiser 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

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