Review of Hallberg-Rassy P 28 Mk I
Basic specs.
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The boat is equipped with 2 cabins, 4 + 1/2 berths, a galley and toilet facility.
The boat is typically equipped with an inboard Albin O-21 gasoline engine at 10.0 hp (7 kW).
The transmission is a shaft drive. A shaft drive will in the long run require less maintenence than other types of drive e.g. a sail drive.
The fuel tank has a capacity of 40.0 liters (10 US gallons, 8 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 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 Hallberg-Rassy P 28 Mk I is about 103 kg/cm, alternatively 577 lbs/inch.
Meaning: if you load 103 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 577 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 L/B (Length Beam Ratio)?
The l/b ratio for Hallberg-Rassy P 28 Mk I is 3.66.
Maintenance
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 | 8.6 m | (28.2 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.6 m | (28.2 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 21.5 m | (70.6 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 18.9 m | (62.1 feet) | 10 mm | (3/8 inch) |
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