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Review of Lohi 17


Basic specs.

sail specifications
The Lohi 17 aka Joe 17 is a small sailboat designed by the Finnish maritime architect Hans Groop. Several hundred boats have been produced.

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Interior
The boat is equipped with 4 berths.

Keel

The boat can enter even shallow marinas as the draft is just about 0.50 - 0.60 meter (1.64 - 1.94 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 Lohi 17 is 2.58, indicating that this boat would not 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 Lohi 17 is about 70 kg/cm, alternatively 395 lbs/inch.
Meaning: if you load 70 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 395 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 Lohi 17 is 2.63.

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.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Lohi 17 is 29%.

Low High 27% 0 50 100
This ballast ratio shows a righting moment that is higher than 27% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.


SA/D (Sail Area Displacement ratio)

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

The SA/D for Lohi 17 with ISO 8666 reference sail is 19.6, with a 135% genua the SA/D is 22.4.

Low High 76% 0 50 100
The SA/D ratio indicates that it is faster than 76% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 79% 0 50 100
The Lohi 17 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 Lohi 17 is 66

Slow Fast 66% 0 50 100
The relative speed performance is 66 which means that a it is faster than 66% of all similar sailboat designs.


Maintenance

Rig

Dimensions of sail.

mainsail specifications genoa 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 16.4 m(53.9 feet)6 mm(1/4 inch)
Jib/genoa halyard16.4 m(53.9 feet)6 mm(1/4 inch)
Spinnaker halyard16.4 m(53.9 feet)6 mm(1/4 inch)
Jib sheet 5.3 m(17.3 feet)8 mm(5/16 inch)
Genoa sheet5.3 m(17.3 feet)8 mm(5/16 inch)
Mainsheet 13.2 m(43.2 feet)8 mm(5/16 inch)
Spinnaker sheet11.6 m(38.0 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 Lohi 17 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