Review of Alerion 28

Basic specs.

sail specifications
The Alerion 28 is a sailboat designed in the late eighties.

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The boat can enter even shallow marinas as the draft is just about 1.37 - 1.47 meter (4.49 - 4.79 ft) dependent on the load. See immersion rate below.


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.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.4 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 Alerion 28 is about 114 kg/cm, alternatively 641 lbs/inch.
Meaning: if you load 114 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 641 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 Alerion 28 is 3.45.

Wide Slim 88% 0 50 100
Compared with other similar sailboats it is slimmer than 88% of all other designs. It seems that the designer has chosen a significantly more speedy hull design.

Over- / underrigged

Low High 99% 0 50 100
The Alerion 28 has more rig than 99% of all similar sailboats, which indicates that the boat is significantly overrigged.


Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 20m2 (215 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.


Dimensions of sail.

mainsail specifications headsail specifications

Are your sails worn out? You might find your next sail here: Sails for Sale

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
Mainsail halyard 26.5 m(86.8 feet)8 mm(5/16 inch)
Jib/genoa halyard26.5 m(86.8 feet)8 mm(5/16 inch)
Spinnaker halyard26.5 m(86.8 feet)8 mm(5/16 inch)
Jib sheet 8.5 m(28.0 feet)10 mm(3/8 inch)
Genoa sheet8.5 m(28.0 feet)10 mm(3/8 inch)
Mainsheet 21.3 m(70.0 feet)10 mm(3/8 inch)
Spinnaker sheet18.8 m(61.6 feet)10 mm(3/8 inch)
Cunningham3.8 m(12.5 feet)8 mm(5/16 inch)
Kickingstrap7.6 m(25.0 feet)8 mm(5/16 inch)
Clew-outhaul7.6 m(25.0 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.

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