Review of Trader 65 (Roberts)
Basic specs.
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Unknown keel type
The boat may be equipped with an inboard 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.
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 Trader 65 (Roberts) is 1.43, 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 10.3 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 Trader 65 (Roberts) is about 611 kg/cm, alternatively 3425 lbs/inch.
Meaning: if you load 611 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 3425 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 Trader 65 (Roberts) is 3.88.
SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 16.13
Sorry, we do not have sufficient statistical information available for this boat to provide a significant reliable analysis.
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 | 19.8 m | (65.0 feet) | 16 mm | (5/8 inch) |
| Genoa sheet | 19.8 m | (65.0 feet) | 16 mm | (5/8 inch) |
| Mainsheet | 49.5 m | (162.4 feet) | 16 mm | (5/8 inch) |
| Spinnaker sheet | 43.6 m | (142.9 feet) | 16 mm | (5/8 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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