Review of Mumm 36

Basic specs.

The Mumm 36 is a sailboat designed by the maritime architect Bruce Farr. The Mumm 36 is built by the French yard Bénéteau.

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Keel

Unknown keel type

The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

The boat can only enter major marinas as the draft is about 2.24 - 2.34 meter (7.35 - 7.65 ft) dependent on the load. See immersion rate below.

Engine

The boat is typically equipped with an inboard Yanmar 2GM20FC-SD20 diesel engine at 18 hp (13 kW).

The transmission is a saildrive.

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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Mumm 36 is about 262 kg/cm, alternatively 1469 lbs/inch.
Meaning: if you load 262 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1469 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 Mumm 36 is 3.04.

Compared with other similar sailboats it is more spacy than 69% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Mumm 36 is 43%.

This ballast ratio shows a righting moment that is higher than 69% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.

Over- / underrigged

The Mumm 36 has more rig than 88% of all similar sailboats, which indicates that the boat is significantly overrigged.

Maintenance

Rig

Dimensions of sail.

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**
Usage	Length		Diameter
Mainsail halyard	35.3 m	(116.0 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	35.3 m	(116.0 feet)	12 mm	(1/2 inch)
Spinnaker halyard	35.3 m	(116.0 feet)	12 mm	(1/2 inch)
Jib sheet	10.9 m	(35.8 feet)	14 mm	(0.55 inch)
Genoa sheet	10.9 m	(35.8 feet)	14 mm	(0.55 inch)
Mainsheet	27.3 m	(89.5 feet)	14 mm	(0.55 inch)
Spinnaker sheet	24.0 m	(78.7 feet)	14 mm	(0.55 inch)
Cunningham	5.0 m	(16.5 feet)	12 mm	(1/2 inch)
Kickingstrap	10.1 m	(33.0 feet)	12 mm	(1/2 inch)
Clew-outhaul	10.1 m	(33.0 feet)	12 mm	(1/2 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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Finally

We are always looking for new photos. If you can contribute with photos for Mumm 36 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

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.