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Review of Stratus 36


Basic specs.

sail specifications
The Stratus 36 is a sailboat designed by the Swedish maritime architect Peter Norlin in the early eighties. A few hundred boats have been produced. The Stratus 36 is built by the Swedish yard Albin Marin AB.

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Hull

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.


Interior

The boat is equipped with 454.0 liter fresh water capacity.


Rig

The Stratus 36 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.


Engine

The boat may be equipped with an inboard Volvo Penta MD11 diesel engine at 23 hp (17 kW). Calculated max speed is about 5.5 knots

The fuel tank has a capacity of 227.0 liters (59 US gallons, 49 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 Stratus 36 is 1.92, 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 Stratus 36 is about 183 kg/cm, alternatively 1028 lbs/inch.
Meaning: if you load 183 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1028 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 Stratus 36 is 24.9.

Low High 42% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 42% 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 Stratus 36 is 3.23.

Wide Slim 54% 0 50 100
Compared with other similar sailboats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Stratus 36 is 252 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 50% 0 50 100
50% of all similar sailboat designs are categorized as heavier. This boat has a precise average ratio between displacement and length!


SA/D (Sail Area Displacement ratio)

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

The SA/D for Stratus 36 with ISO 8666 reference sail is 17.8, with a 135% genua the SA/D is 20.7.

Low High 66% 0 50 100
The SA/D ratio indicates that it is faster than 66% of all similar sailboat designs in light wind.


Maintenance

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 33.8 m(110.8 feet)12 mm(1/2 inch)
Jib/genoa halyard33.8 m(110.8 feet)12 mm(1/2 inch)
Spinnaker halyard33.8 m(110.8 feet)12 mm(1/2 inch)
Jib sheet 10.7 m(35.0 feet)14 mm(0.55 inch)
Genoa sheet10.7 m(35.0 feet)14 mm(0.55 inch)
Mainsheet 26.7 m(87.5 feet)14 mm(0.55 inch)
Spinnaker sheet23.5 m(77.0 feet)14 mm(0.55 inch)
Cunningham4.3 m(14.1 feet)12 mm(1/2 inch)
Kickingstrap8.6 m(28.2 feet)12 mm(1/2 inch)
Clew-outhaul8.6 m(28.2 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.

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 Stratus 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