Review of Com-Pac 27 Mk 2
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 Com-Pac 27 Mk 2 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.
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 Com-Pac 27 Mk 2 is 2.09, indicating that this boat would not 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 6.6 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 Com-Pac 27 Mk 2 is about 143 kg/cm, alternatively 804 lbs/inch.
Meaning: if you load 143 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 804 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 Com-Pac 27 Mk 2 is 17.7.
What is L/B (Length Beam Ratio)?
The l/b ratio for Com-Pac 27 Mk 2 is 3.11.
What is Displacement Length Ratio?
The DL-ratio for Com-Pac 27 Mk 2 is 187 which categorizes this boat among 'light racers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Com-Pac 27 Mk 2 with ISO 8666 reference sail is 15.8, with a 135% genua the SA/D is 18.7.
Maintenance
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.
| Usage | Length | Diameter | ||
| Mainsail halyard | 20.9 m | (68.4 feet) | 10 mm | (3/8 inch) |
| Jib/genoa halyard | 20.9 m | (68.4 feet) | 10 mm | (3/8 inch) |
| Spinnaker halyard | 20.9 m | (68.4 feet) | 10 mm | (3/8 inch) |
| Jib sheet | 9.0 m | (29.6 feet) | 12 mm | (1/2 inch) |
| Genoa sheet | 9.0 m | (29.6 feet) | 12 mm | (1/2 inch) |
| Mainsheet | 22.5 m | (74.0 feet) | 12 mm | (1/2 inch) |
| Spinnaker sheet | 19.8 m | (65.1 feet) | 12 mm | (1/2 inch) |
| Cunningham | 3.7 m | (12.0 feet) | 10 mm | (3/8 inch) |
| Kickingstrap | 7.3 m | (24.0 feet) | 10 mm | (3/8 inch) |
| Clew-outhaul | 7.3 m | (24.0 feet) | 10 mm | (3/8 inch) |
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