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Review of X-102


X-102
X-102 anno 1986. Asterix of Helford of Cherbourg 2012


Basic specs.

sail specifications
The X-102 is a sailboat designed by the maritime architect Niels Jeppesen in the early eighties. A few hundred boats have been produced. The X-102 is built by the Danish yard Nordsø Bådeværft.

Looking for a new boat? Find a X-102 or similar boat for sale

Hull

Both the hull and the deck is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

Both the hull and the deck is a sandwich construction which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.


Interior

The interior is like many other boats made of mahogany. Mahogany belongs to the hardwood species, known for being water-repellent and resistant to decay. It has an attractive wood grain and holds wood polish and varnish well.
The boat is equipped with 3 cabins, 6-8 berths, a galley, 105.0 liter fresh water capacity and toilet facility.

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


Rig

The X-102 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

Fin keel

The X-102 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full 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.

X-102 can only enter major marinas as the draft is about 1.91 - 2.01 meter (6.27 - 6.57 ft) dependent on the load. See immersion rate below.


Engine

The X-102 has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with an inboard Yanmar 2GM diesel engine

Alternative 2:

The boat may be equipped with an inboard Yanmar diesel engine at 18 hp (13 kW). The speed is 7.5 knots.

The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.

The fuel tank, which is made of stainless steel, has a capacity of 54.0 liters (14 US gallons, 11 imperial gallons).


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 X-102 is 2.22, indicating that this boat would not be accepted to participate in ocean races.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.7 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 X-102 is about 172 kg/cm, alternatively 963 lbs/inch.
Meaning: if you load 172 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 963 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for X-102 is 18.1.

Low High 15% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 15% of all similar sailboat designs. This is a comfort value significantly below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for X-102 is 2.96.

Slim Wide 73% 0 50 100
Compared with other similar sailboats it is more spacy than 73% 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 X-102 is 44%.

Low High 66% 0 50 100
This ballast ratio shows a righting moment that is higher than 66% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for X-102 is 228 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 58% 0 50 100
58% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


SA/D (Sail Area Displacement ratio)

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

The SA/D for X-102 with ISO 8666 reference sail is 21.5, with a 135% genua the SA/D is 24.6.

Low High 97% 0 50 100
The SA/D ratio indicates that it is faster than 97% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 79% 0 50 100
The X-102 has more rig than 79% 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 X-102 is 90

Slow Fast 90% 0 50 100
The relative speed performance is 90 which means that a it is faster than 90% of all similar sailboat designs.


Maintenance

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 30m2 (322 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.


Rig

Dimensions of sail for fractional rig.

mainsail specifications genoa specifications spinnaker 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
UsageLengthDiameter
Mainsail halyard 33.5 m(110.1 feet)10 mm(3/8 inch)
Jib/genoa halyard33.5 m(110.1 feet)10 mm(3/8 inch)
Spinnaker halyard33.5 m(110.1 feet)10 mm(3/8 inch)
Jib sheet 10.0 m(32.8 feet)12 mm(1/2 inch)
Genoa sheet10.0 m(32.8 feet)12 mm(1/2 inch)
Mainsheet 25.0 m(82.0 feet)12 mm(1/2 inch)
Spinnaker sheet22.0 m(72.2 feet)12 mm(1/2 inch)
Cunningham4.6 m(15.1 feet)10 mm(3/8 inch)
Kickingstrap9.2 m(30.2 feet)10 mm(3/8 inch)
Clew-outhaul9.2 m(30.2 feet)10 mm(3/8 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.

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



Finally

We are always looking for new photos. If you can contribute with photos for X-102 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