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Review of Linjett 33


Basic specs.

sail specifications
The Linjett 33 is a sailboat designed by the Swedish maritime architect Mats Gustafsson in the mid nineties. A few hundred boats have been produced. The Linjett 33 is built by the Swedish yard Rosättra Båtvarv Aktiebolag.

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Hull

Both the hull and the deck is made of hand laid fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.
The hull is a double hull 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 boat is equipped with 5 berths, 174.0 liter fresh water capacity and toilet facility.


Rig

The Linjett 33 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 Linjett 33 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 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 most marinas as the draft is just about 1.66 - 1.76 meter (5.45 - 5.75 ft) dependent on the load. See immersion rate below.


Engine

The Linjett 33 has been equipped with different engine alternatives.

Alternative 1:

Linjett 33 may be equipped with an inboard Yanmar 2GM20F diesel engine at 18 hp (13 kW). Max speed is 7.0 knots.

Alternative 2:

The boat may be equipped with an inboard Volvo Penta MD2020 diesel engine at 18 hp (13 kW). Max speed is 7.0 knots.

The fuel tank has a capacity of 91.0 liters (24 US gallons, 20 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 Linjett 33 is 1.98, indicating that this boat could - if evaluated by this formula alone - 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 7.0 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 Linjett 33 is about 178 kg/cm, alternatively 998 lbs/inch.
Meaning: if you load 178 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 998 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 Linjett 33 is 22.7.

Low High 38% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 38% of all similar sailboat designs. This comfort value is just below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Linjett 33 is 3.12.

Slim Wide 58% 0 50 100
Compared with other similar sailboats it is more spacy than 58% 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 Linjett 33 is 40%.

Low High 46% 0 50 100
This ballast ratio shows a righting moment that is higher than 46% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Linjett 33 is 226 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 62% 0 50 100
62% 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 Linjett 33 with ISO 8666 reference sail is 16.7, with a 135% genua the SA/D is 19.4.

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


Over- / underrigged

Low High 73% 0 50 100
The Linjett 33 has more rig than 73% of all similar sailboats, which indicates that the boat is slightly overrigged.


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 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
UsageLengthDiameter
Mainsail halyard 32.4 m(106.4 feet)10 mm(3/8 inch)
Jib/genoa halyard32.4 m(106.4 feet)10 mm(3/8 inch)
Spinnaker halyard32.4 m(106.4 feet)10 mm(3/8 inch)
Jib sheet 10.1 m(33.1 feet)12 mm(1/2 inch)
Genoa sheet10.1 m(33.1 feet)12 mm(1/2 inch)
Mainsheet 25.2 m(82.8 feet)12 mm(1/2 inch)
Spinnaker sheet22.2 m(72.9 feet)12 mm(1/2 inch)
Cunningham4.0 m(13.1 feet)10 mm(3/8 inch)
Kickingstrap8.0 m(26.2 feet)10 mm(3/8 inch)
Clew-outhaul8.0 m(26.2 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 Linjett 33 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