Udkik.dk

Review of Triss Norlin


Triss Norlin
Triss Norlin anno 1981.

Basic specs.

sail specifications
The Triss Norlin is a small sailboat designed by the Swedish maritime architect Peter Norlin in the late seventies. A few hundred boats have been produced.

Looking for a new boat? Find a Triss Norlin or similar boat for sale

Cockpit
Cockpit
Cockpit of Triss Norlin anno 1980.
Rig
Rig
Rig of Triss Norlin anno 1978.
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 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.

The boat can enter even shallow marinas as the draft is just about 0.97 - 1.07 meter (3.18 - 3.48 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 Triss Norlin is 2.33, 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 5.3 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 Triss Norlin is about 71 kg/cm, alternatively 401 lbs/inch.
Meaning: if you load 71 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 401 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 Triss Norlin is 12.9.

Low High 66% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 66% of all similar sailboat designs. This comfort value is just above average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Triss Norlin is 2.58.

Slim Wide 62% 0 50 100
Compared with other similar sailboats it is more spacy than 62% 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 Triss Norlin is 39%.

Low High 62% 0 50 100
This ballast ratio shows a righting moment that is higher than 62% 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 Triss Norlin is 226 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 24% 0 50 100
24% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.


SA/D (Sail Area Displacement ratio)

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

The SA/D for Triss Norlin with ISO 8666 reference sail is 15.7, with a 135% genua the SA/D is 18.2.

Low High 27% 0 50 100
The SA/D ratio indicates that it is faster than 27% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 54% 0 50 100
The Triss Norlin has more rig than 54% of all similar sailboats, which indicates that the boat is slightly overrigged.


RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Triss Norlin is 27

Slow Fast 27% 0 50 100
The relative speed performance is 27 which means that a it is faster than 27% 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 12m2 (129 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 18.1 m(59.2 feet)6 mm(1/4 inch)
Jib/genoa halyard18.1 m(59.2 feet)6 mm(1/4 inch)
Spinnaker halyard18.1 m(59.2 feet)6 mm(1/4 inch)
Jib sheet 5.8 m(18.9 feet)8 mm(5/16 inch)
Genoa sheet5.8 m(18.9 feet)8 mm(5/16 inch)
Mainsheet 14.4 m(47.2 feet)8 mm(5/16 inch)
Spinnaker sheet12.7 m(41.5 feet)8 mm(5/16 inch)
Cunningham2.4 m(7.7 feet)6 mm(1/4 inch)
Kickingstrap4.7 m(15.4 feet)6 mm(1/4 inch)
Clew-outhaul4.7 m(15.4 feet)6 mm(1/4 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 Triss Norlin 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