Review of Mustang

Basic specs.

The Mustang is a sailboat designed by the Swedish maritime architect Tord Byqvist.

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Rig

The boat 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 genaker or a spinnaker for optimal speed.

Keel

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 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.

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 Mustang is 1.57, indicating that this boat could - if evaluated by this formula alone - 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 Mustang is about 122 kg/cm, alternatively 687 lbs/inch.
Meaning: if you load 122 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 687 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 Mustang is 4.92.

Compared with other similar sailboats it is slimmer than 100% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Mustang is 58%.

This ballast ratio shows a righting moment that is higher than 99% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.

SA/D (Sail Area Displacement ratio)

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

The SA/D for Mustang with ISO 8666 reference sail is 18.3, with a 135% genua the SA/D is 20.5.

The SA/D ratio indicates that it is faster than 76% of all similar sailboat designs in light wind.

Over- / underrigged

The Mustang has more rig than 85% of all similar sailboats, which indicates that the boat is significantly overrigged.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Mustang is 73

The relative speed performance is 73 which means that a it is faster than 73% of all similar sailboat designs.

Maintenance

Rig

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.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Mainsail halyard	26.3 m	(86.3 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	26.3 m	(86.3 feet)	10 mm	(3/8 inch)
Spinnaker halyard	26.3 m	(86.3 feet)	10 mm	(3/8 inch)
Jib sheet	9.5 m	(31.2 feet)	12 mm	(1/2 inch)
Genoa sheet	9.5 m	(31.2 feet)	12 mm	(1/2 inch)
Mainsheet	23.8 m	(77.9 feet)	12 mm	(1/2 inch)
Spinnaker sheet	20.9 m	(68.6 feet)	12 mm	(1/2 inch)
Cunningham	3.6 m	(11.8 feet)	10 mm	(3/8 inch)
Kickingstrap	7.2 m	(23.6 feet)	10 mm	(3/8 inch)
Clew-outhaul	7.2 m	(23.6 feet)	10 mm	(3/8 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.

Finally

We are always looking for new photos. If you can contribute with photos for Mustang (Byqvist) 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.