Review of db 1

Basic specs.

The db 1 is a sailboat designed by the Dutch maritime architect E. G. van de Stadt in the early eighties. The db 1 is built by the German yard Dehler Yachts GmbH.

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Hull

The hull is made of fibreglass. Generally, a hull made of 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.

Interior

The boat is equipped with a galley and toilet facility.

Keel

Engine

The boat is typically equipped with an inboard Farymann diesel engine at 22.0 hp (16 kW), which gives a max speed about 6.7 knots.

The fuel tank has a capacity of 42.0 liters (11 US gallons, 9 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 db 1 is 2.30, 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 6.9 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 db 1 is about 184 kg/cm, alternatively 1033 lbs/inch.
Meaning: if you load 184 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1033 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 db 1 is 15.7.

Comparing this ratio with similar sailboats show that it is more comfortable than 8% of all similar sailboat designs. This is a comfort value significantly below average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for db 1 is 2.97.

Compared with other similar sailboats it is more spacy than 73% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for db 1 is 173 which categorizes this boat among 'light racers'.

82% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.

SA/D (Sail Area Displacement ratio)

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

The SA/D for db 1 with ISO 8666 reference sail is 21.9, with a 135% genua the SA/D is 25.0.

The SA/D ratio indicates that it is faster than 98% of all similar sailboat designs in light wind.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for db 1 is 85

The relative speed performance is 85 which means that a it is faster than 85% of all similar sailboat designs.

Maintenance

Rig

Dimensions of sail.

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	32.6 m	(107.0 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	32.6 m	(107.0 feet)	10 mm	(3/8 inch)
Spinnaker halyard	32.6 m	(107.0 feet)	10 mm	(3/8 inch)
Jib sheet	10.1 m	(33.2 feet)	12 mm	(1/2 inch)
Genoa sheet	10.1 m	(33.2 feet)	12 mm	(1/2 inch)
Mainsheet	25.3 m	(82.9 feet)	12 mm	(1/2 inch)
Spinnaker sheet	22.2 m	(73.0 feet)	12 mm	(1/2 inch)
Cunningham	4.5 m	(14.8 feet)	10 mm	(3/8 inch)
Kickingstrap	9.0 m	(29.6 feet)	10 mm	(3/8 inch)
Clew-outhaul	9.0 m	(29.6 feet)	10 mm	(3/8 inch)

Boat owner's ideas

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

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

Finally

We are always looking for new photos. If you can contribute with photos for db 1 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.