Review of Gapt 38
Basic specs.
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The hull is made of aluminium. Aluminum is strong and forgiving. Where an impact on a fiberglass hull will result in major gelcoat damage and possible cracking, an aluminum hull will probably only have a scratch or a small bend. The only concern is electrolysis. Ensure that you have proper sacrificial anodes installed.
The boat is equipped with 3-6 berths.
Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.
Unknown keel type
Gapt 38 can only enter major marinas as the draft is about 1.80 - 1.90 meter (5.91 - 6.21 ft) dependent on the load. See immersion rate below.
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 Gapt 38 is 1.92, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Gapt 38 is about 275 kg/cm, alternatively 1545 lbs/inch.
Meaning: if you load 275 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 1545 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 Gapt 38 is 3.27.
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): 25.10
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 | 11.6 m | (38.1 feet) | 14 mm | (0.55 inch) |
| Genoa sheet | 11.6 m | (38.1 feet) | 14 mm | (0.55 inch) |
| Mainsheet | 29.0 m | (95.1 feet) | 14 mm | (0.55 inch) |
| Spinnaker sheet | 25.5 m | (83.7 feet) | 14 mm | (0.55 inch) |
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