Review of Pearson 424 Ketch
Basic specs.
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The boat is typically equipped with a Westerbeke 60 diesel engine at 54.0 hp (40 kW), which gives a max speed about 6.9 knots.
The fuel tank has a capacity of 303 liters (80 US gallons, 66 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 Pearson 424 Ketch is 1.88, 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 7.8 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 Pearson 424 Ketch is about 272 kg/cm, alternatively 1524 lbs/inch.
Meaning: if you load 272 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1524 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 Pearson 424 Ketch is 3.26.
What is Displacement Length Ratio?
The DL-ratio for Pearson 424 Ketch is 245 which categorizes this boat among 'light crusers & offshore racers'.
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Pearson 424 Ketch with ISO 8666 reference sail is 13.1, with a 135% genua the SA/D is 15.6.
Maintenance
Dimensions of sail for ketch 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 | 30.2 m | (99.2 feet) | 12 mm | (1/2 inch) |
| Jib/genoa halyard | 30.2 m | (99.2 feet) | 12 mm | (1/2 inch) |
| Spinnaker halyard | 30.2 m | (99.2 feet) | 12 mm | (1/2 inch) |
| Jib sheet | 12.9 m | (42.3 feet) | 14 mm | (0.55 inch) |
| Genoa sheet | 12.9 m | (42.3 feet) | 14 mm | (0.55 inch) |
| Mainsheet | 32.2 m | (105.8 feet) | 14 mm | (0.55 inch) |
| Spinnaker sheet | 28.4 m | (93.1 feet) | 14 mm | (0.55 inch) |
| Cunningham | 4.4 m | (14.5 feet) | 12 mm | (1/2 inch) |
| Kickingstrap | 8.8 m | (29.0 feet) | 12 mm | (1/2 inch) |
| Clew-outhaul | 8.8 m | (29.0 feet) | 12 mm | (1/2 inch) |
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