Basic specs.
The Trapper 28 aka Trapper 400 is a sailboat designed by the maritime architect bureau in the late sixties. The Trapper 28 is built by the British yard Anstey Yachts Ltd..
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Hull
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.
Rig
The boat 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.
Keel
Keel of Trapper 28.
Engine
The boat is typically equipped with an engine.
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.
Stability and Safety
What is Capsize Screening Formula (CSF)?
The capsize screening value for Trapper 28 is 2.02, indicating that this boat would not be accepted to participate in ocean races.
Theoretical Maximum Hull Speed
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 6.3 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.
Immersion rate
The immersion rate is defined as the weight required to sink the boat a certain level.The immersion rate for Trapper 28 is about 116 kg/cm, alternatively 652 lbs/inch.
Meaning: if you load 116 kg cargo on the boat then it will sink 1 cm.Alternatively, if you load 652 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.
Motion Comfort Ratio
What is Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Trapper 28 is 17.6.
Comparing this ratio with similar sailboats show that it is more comfortable than 24% of all similar sailboat designs.This is a comfort value significantly below average.
L/B (Length Beam Ratio)
What is L/B (Length Beam Ratio)?
The l/b ratio for Trapper 28 is 3.34.
Compared with other similar sailboats it is slimmer than 79% of all other designs.It seems that the designer has chosen a significantly more speedy hull design.
D/L (Displacement Length Ratio)
What is Displacement Length Ratio?
The DL-ratio for Trapper 28 is 198 which categorizes this boat among 'light racers'.
73% of all similar sailboat designs are categorized as heavier.A light displacement requires less sailarea and has higher accellerations.
SA/D (Sail Area Displacement ratio)
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): 17.09
RSP (Relative Speed Performance)
What is Relative Speed Performance?
The Relative Speed Performance for Trapper 28 is 66
The relative speed performance is 66 which means that a it is faster than 66% of all similar sailboat designs.
Maintenance
Rig
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 | (28.3 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 8.6 m | (28.3 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 21.6 m | (70.9 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 19.0 m | (62.4 feet) | 10 mm | (3/8 inch) |
Boat owner's ideas
This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.
Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.
Finally
We are always looking for new photos. If you can contribute with photos for Trapper 28 it would be a great help.
If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.
References
