Review of Tartan 27 Mk II
Basic specs.
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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.
The boat is equipped with 114.0 liter fresh water capacity.
The Tartan 27 Mk II is equipped with a yawl rig. A yawl rig is generally considered easier to handle, because the sails are smaller, and because it can sail on most points to the wind with one sail completely taken down for repair or while reefing. The sail configuration of a yawl allows for better comfort and stability when sailing downwind or on a broad reach.
CentreBoard
The Tartan 27 Mk II is equipped with a centreboard keel. A centreboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.
The boat can enter even shallow marinas as the draft is just about 0.97 - 1.07 meter (3.18 - 3.48 ft) dependent on the load. See immersion rate below.
Tartan 27 Mk II may be equipped with an inboard Universal Atomic 4 gasoline engine at 30 hp (22 kW). Calculated max speed is about 6.9 knots
The fuel tank has a capacity of 75.0 liters (19 US gallons, 16 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 Tartan 27 Mk II is 1.77, 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 6.2 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 Tartan 27 Mk II is about 115 kg/cm, alternatively 644 lbs/inch.
Meaning: if you load 115 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 644 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 Tartan 27 Mk II is 27.9.
What is L/B (Length Beam Ratio)?
The l/b ratio for Tartan 27 Mk II is 3.13.
The ballast ratio for Tartan 27 Mk II is 32%.
What is Displacement Length Ratio?
The DL-ratio for Tartan 27 Mk II is 336 which categorizes this boat among 'heavy cruisers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Tartan 27 Mk II with ISO 8666 reference sail is 15.8, with a 135% genua the SA/D is 18.4.
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 22m2 (236 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.
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.
| Usage | Length | Diameter | ||
| Mainsail halyard | 24.6 m | (80.5 feet) | 8 mm | (5/16 inch) |
| Jib/genoa halyard | 24.6 m | (80.5 feet) | 8 mm | (5/16 inch) |
| Spinnaker halyard | 24.6 m | (80.5 feet) | 8 mm | (5/16 inch) |
| Jib sheet | 8.2 m | (27.0 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.2 m | (27.0 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 20.6 m | (67.5 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 18.1 m | (59.4 feet) | 10 mm | (3/8 inch) |
| Cunningham | 4.1 m | (13.5 feet) | 8 mm | (5/16 inch) |
| Kickingstrap | 8.2 m | (27.0 feet) | 8 mm | (5/16 inch) |
| Clew-outhaul | 8.2 m | (27.0 feet) | 8 mm | (5/16 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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