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Review of Leisure 27


Basic specs.

sail specifications
The Leisure 27 is a sailboat designed by the maritime architect Frank Pryor in the late seventies. A few hundred boats have been produced. The Leisure 27 is built by the British yard Cobramold Ltd..

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Hull

Both the hull and the deck 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 interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with 6 berths, a galley and toilet facility.


Rig

The boat has more than one rig.

One option is 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
Keel of Leisure 27 anno 1979. Dark Star

The Leisure 27 has been built with different keel alternatives.

Bilge keel

One option is a bilge keel. A bilge keel is a double keel, which allows the boat to be beached. Bilge keels are the most popular keel for tidal waters.

Leisure 27 can enter even shallow marinas as the draft is just about 1.19 - 1.29 meter (3.90 - 4.20 ft) dependent on the load. See immersion rate below.

Fin keel

Another option is a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.

The boat can enter even shallow marinas as the draft is just about 1.49 - 1.59 meter (4.89 - 5.19 ft) dependent on the load. See immersion rate below.


Engine

The Leisure 27 has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with an inboard Volvo Penta MD 7A diesel engine at 13 hp (9 kW). Calculated max speed is about 4.8 knots

The transmission is a saildrive.

Alternative 2:

Leisure 27 may be equipped with an inboard Volvo Penta MD 5A diesel engine at 7 hp (5 kW). Calculated max speed is about 3.5 knots

The transmission is a saildrive.


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 Leisure 27 is 1.95, 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 6.3 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 Leisure 27 is about 126 kg/cm, alternatively 706 lbs/inch.
Meaning: if you load 126 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 706 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 Leisure 27 is 22.9.

Low High 66% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 66% 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 Leisure 27 is 2.93.

Slim Wide 66% 0 50 100
Compared with other similar sailboats it is more spacy than 66% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Leisure 27 is 56%.

Low High 98% 0 50 100
This ballast ratio shows a righting moment that is higher than 98% 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 Leisure 27 is 284 which categorizes this boat among 'medium weight cruisers'.

Heavy Light 31% 0 50 100
31% 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.


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 20m2 (215 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

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
Masthead rig
UsageLengthDiameter
Jib sheet 8.2 m(27.0 feet)10 mm(3/8 inch)
Genoa sheet8.2 m(27.0 feet)10 mm(3/8 inch)
Mainsheet 20.6 m(67.5 feet)10 mm(3/8 inch)
Spinnaker sheet18.1 m(59.4 feet)10 mm(3/8 inch)
Masthead rig
UsageLengthDiameter
Jib sheet 8.2 m(27.0 feet)10 mm(3/8 inch)
Genoa sheet8.2 m(27.0 feet)10 mm(3/8 inch)
Mainsheet 20.6 m(67.5 feet)10 mm(3/8 inch)
Spinnaker sheet18.1 m(59.4 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 Leisure 27 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