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Review of Challenger Micro 18


Basic specs.

sail specifications
The Challenger Micro 18 is a small sailboat designed by the French maritime architect Jacques Gaubert.

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Interior

The boat is equipped with 4 berths.


Keel

Unknown keel type

The boat can enter even shallow marinas as the draft is just about 0.45 - 0.55 meter (1.48 - 1.78 ft) dependent on the load. See immersion rate below.


Engine

An outboard motor is often used on this boat. In that case Challenger Micro 18 will typically require a power of 1 - 2 hp, alternatively 25 - 30 lbs thrust if you prefer an electrical motor. Electric outboards are becoming popular for sailboat owners who want clean instant power with less noise and no exhaust fumes.


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 Challenger Micro 18 is 2.82, indicating that this boat would not be accepted to participate in ocean races.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Challenger Micro 18 is about 85 kg/cm, alternatively 478 lbs/inch.
Meaning: if you load 85 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 478 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.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Challenger Micro 18 is 2.37.

Slim Wide 82% 0 50 100
Compared with other similar sailboats it is more spacy than 82% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.


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): 25.88


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.



Guiding dimensions of running rig
UsageLengthDiameter
Jib sheet 5.5 m(18.0 feet)8 mm(5/16 inch)
Genoa sheet5.5 m(18.0 feet)8 mm(5/16 inch)
Mainsheet 13.8 m(45.1 feet)8 mm(5/16 inch)
Spinnaker sheet12.1 m(39.7 feet)8 mm(5/16 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 Challenger Micro 18 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