Review of Verl 900

Basic specs.

The Verl 900 is a sailboat designed by the British maritime architect Robert Clark in the mid seventies. A few hundred boats have been produced. The Verl 900 is built by the British yard Verlvale Ltd. (UK).

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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 6 berths, a galley and toilet facility.

Rig

The Verl 900 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

Fin keel

The Verl 900 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full 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 enter most marinas as the draft is just about 1.60 - 1.70 meter (5.25 - 5.55 ft) dependent on the load. See immersion rate below.

Engine

The Verl 900 has been equipped with different engine alternatives.

Alternative 1:

Verl 900 may be equipped with an inboard Yanmar 2GM20 diesel engine

The transmission is a saildrive.

Alternative 2:

The boat may be equipped with an inboard Volvo Penta MD7A diesel engine

The transmission is a saildrive.

The fuel tank has a capacity of 60.0 liters (15 US gallons, 13 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 Verl 900 is 1.98, 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 6.7 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 Verl 900 is about 149 kg/cm, alternatively 834 lbs/inch.
Meaning: if you load 149 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 834 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 Verl 900 is 20.5.

Comparing this ratio with similar sailboats show that it is more comfortable than 38% of all similar sailboat designs. This comfort value is just below average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Verl 900 is 3.06.

Compared with other similar sailboats it is more spacy than 50% of all other designs. It seems that the designer has chosen an average hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Verl 900 is 42%.

This ballast ratio shows a righting moment that is higher than 58% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Verl 900 is 195 which categorizes this boat among 'light racers'.

76% 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 Verl 900 with ISO 8666 reference sail is 16.0, with a 135% genua the SA/D is 18.9.

The SA/D ratio indicates that it is faster than 50% of all similar sailboat designs in light wind.

Over- / underrigged

The Verl 900 has more rig than 54% 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 Verl 900 is 58

The relative speed performance is 58 which means that a it is faster than 58% 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 26m² (279 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	25.6 m	(83.8 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	25.6 m	(83.8 feet)	8 mm	(5/16 inch)
Spinnaker halyard	25.6 m	(83.8 feet)	8 mm	(5/16 inch)
Jib sheet	8.8 m	(29.0 feet)	10 mm	(3/8 inch)
Genoa sheet	8.8 m	(29.0 feet)	10 mm	(3/8 inch)
Mainsheet	22.1 m	(72.6 feet)	10 mm	(3/8 inch)
Spinnaker sheet	19.5 m	(63.9 feet)	10 mm	(3/8 inch)
Cunningham	3.4 m	(11.2 feet)	8 mm	(5/16 inch)
Kickingstrap	6.8 m	(22.3 feet)	8 mm	(5/16 inch)
Clew-outhaul	6.8 m	(22.3 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Verl 900 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.