Review of Boheme Mini

The hull is made of plywood.

Interior of Boheme Mini anno 1978. Inside view facing aft

The boat is equipped with 5 berths.

Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.

Front cabin of Boheme Mini anno 1978. Inside view facing fwd.

The Boheme Mini is equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a gennaker or a spinnaker for optimal speed.

Keel of Boheme Mini anno 1978. On the hook for bottom inspection (fall 2007)

Fin keel

The Boheme Mini is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.

The keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated. As the surface of a fin type keel is just a fraction of the total wet surface, the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.

Boheme Mini can enter even shallow marinas as the draft is just about 1.10 - 1.20 meter (3.61 - 3.91 ft) dependent on the load. See immersion rate below.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Boheme Mini is 2.55, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 5.8 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.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Boheme Mini is about 98 kg/cm, alternatively 552 lbs/inch.
Meaning: if you load 98 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 552 lbs cargo on the boat it will sink 1 inch.

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Boheme Mini is 8.2 - 10.7.

What is L/B (Length Beam Ratio)?

The l/b ratio for Boheme Mini is 2.45.

What is a Ballast Ratio?

The ballast ratio for Boheme Mini is 34%.

What is Displacement Length Ratio?

The DL-ratio for Boheme Mini is 137 which categorizes this boat among 'ultra light racers'.

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Boheme Mini with ISO 8666 reference sail is 15.7, with a 135% genua the SA/D is 18.3.

What is Relative Speed Performance?

The Relative Speed Performance for Boheme Mini is 50

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 16m² (172 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 for fractional rig.

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.

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.

We are always looking for new photos. If you can contribute with photos for Boheme Mini 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.