Review of LM 27
Basic specs.
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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.
The deck is a sandwich construction which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.
The interior is like many other boats made of mahogany. Mahogany belongs to the hardwood species, known for being water-repellent and resistant to decay. It has an attractive wood grain and holds wood polish and varnish well.
The boat is equipped with 6 berths, a galley, 120.0 liter fresh water capacity and toilet facility.
The LM 27 is built 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.
Full keel
The LM 27 is built with a long keel. A full keel provide a better directional stability than a similar boat with a fin keel; on the other hand, better directional stability means also that the boat is more difficult to handle in a harbour with less space.
The boat can enter even shallow marinas as the draft is just about 0.95 - 1.05 meter (3.12 - 3.42 ft) dependent on the load. See immersion rate below.
The LM 27 has been equipped with different engine alternatives.
Alternative 1:
LM 27 may be equipped with an inboard Volvo Penta MD17 diesel engine at 36 hp (26 kW). Calculated max speed is about 7.3 knots
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
Alternative 2:
The boat may be equipped with an inboard Volvo Penta MD 17C diesel engine at 36 hp (26 kW). Calculated max speed is about 7.3 knots
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
Alternative 3:
The boat may be equipped with an inboard Volvo Penta MD 11C diesel engine
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
Alternative 4:
LM 27 may be equipped with an inboard Bukh DV36 diesel engine at 36 hp (26 kW). Calculated max speed is about 7.3 knots
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
Alternative 5:
The boat may be equipped with an inboard Bukh DV20ME diesel engine at 20 hp (14 kW). The speed is 7.0 knots.
The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.
The fuel tank, which is made of fibreglass, has a capacity of 120.0 liters (31 US gallons, 26 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.
What is Capsize Screening Formula (CSF)?
The capsize screening value for LM 27 is 1.75, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 6.5 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.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for LM 27 is about 130 kg/cm, alternatively 732 lbs/inch.
Meaning: if you load 130 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 732 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.
What is Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for LM 27 is 29.5.
What is L/B (Length Beam Ratio)?
The l/b ratio for LM 27 is 3.04.
The ballast ratio for LM 27 is 45%.
What is Displacement Length Ratio?
The DL-ratio for LM 27 is 311 which categorizes this boat among 'medium weight cruisers'.
What is Relative Speed Performance?
The Relative Speed Performance for LM 27 is 1
Maintenance
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.
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.
| Usage | Length | Diameter | ||
| Jib sheet | 8.3 m | (27.4 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.3 m | (27.4 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 20.9 m | (68.5 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 18.4 m | (60.3 feet) | 10 mm | (3/8 inch) |
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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