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Review of MD 90


Basic specs.

sail specifications
The MD 90 is a large sailboat designed by the maritime architect bureau Harry Miesbauer Yacht Design.

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Interior
The boat is equipped with 8+2 berths.

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 MD 90 is 2.33, indicating that this boat would not be accepted to participate in ocean races.


EU classification

MD 90 holds one CE certification:

The boat is by European Union certified as Class A. OCEAN:
Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant wave heights of 4 m and above but excluding abnormal conditions, and vessels largely self-sufficient.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 12.3 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 MD 90 is about 1059 kg/cm, alternatively 5930 lbs/inch.
Meaning: if you load 1059 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 5930 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 MD 90 is 4.38.


Sorry, we do not have sufficient statistical information available for this boat to provide a significant reliable analysis.

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 27.0 m(88.6 feet)16 mm(5/8 inch)
Genoa sheet 27.0 m(88.6 feet)16 mm(5/8 inch)
Mainsheet 67.5 m(221.5 feet)16 mm(5/8 inch)
Spinnaker sheet59.4 m(194.9 feet)16 mm(5/8 inch)

Boat owner's ideas

This section is reserved boat owner's changes, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for MD 90 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