Review of Guyline 95

Guyline 95 anno 1985.

Basic specs.

The Guyline 95 is a sailboat designed by the Finnish maritime architect Guy-Christer Lönngren in the mid eighties. The Guyline 95 is built by the Finnish yard GCL Design.

Looking for a new boat? Find a Guyline 95 or similar boat for sale

Interior

The boat is equipped with 6 berths.
The headroom is above average

Galley of Guyline 95 anno 1991.

Rig

The boat has more than one rig.

One option is 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.

Engine

Guyline 95 is typically equipped with an inboard Yanmar diesel engine at 18.0 hp (13 kW), which gives a max speed about 6.0 knots.

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 Guyline 95 is 2.03, 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 6.9 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 Guyline 95 is about 160 kg/cm, alternatively 900 lbs/inch.
Meaning: if you load 160 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 900 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 Guyline 95 is 19.2.

Comparing this ratio with similar sailboats show that it is more comfortable than 24% 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 Guyline 95 is 3.15.

Compared with other similar sailboats it is more spacy than 50% of all other designs. It seems that the designer has chosen an average hull design.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Guyline 95 is 179 which categorizes this boat among 'light racers'.

82% 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 Guyline 95 with ISO 8666 reference sail is 19.4, with a 135% genua the SA/D is 22.3.

The SA/D ratio indicates that it is faster than 86% of all similar sailboat designs in light wind.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Guyline 95 is 79

The relative speed performance is 79 which means that a it is faster than 79% of all similar sailboat designs.

Maintenance

Rig

Dimensions of sail for fractional rig.

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**
Fractional rig
Usage	Length		Diameter
Mainsail halyard	33.0 m	(108.4 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	33.0 m	(108.4 feet)	10 mm	(3/8 inch)
Spinnaker halyard	33.0 m	(108.4 feet)	10 mm	(3/8 inch)
Jib sheet	9.4 m	(31.0 feet)	12 mm	(1/2 inch)
Genoa sheet	9.4 m	(31.0 feet)	12 mm	(1/2 inch)
Mainsheet	23.6 m	(77.5 feet)	12 mm	(1/2 inch)
Spinnaker sheet	20.8 m	(68.2 feet)	12 mm	(1/2 inch)
Cunningham	3.8 m	(12.5 feet)	10 mm	(3/8 inch)
Kickingstrap	7.6 m	(24.9 feet)	10 mm	(3/8 inch)
Clew-outhaul	7.6 m	(24.9 feet)	10 mm	(3/8 inch)
Fractional rig
Usage	Length		Diameter
Mainsail halyard	30.8 m	(101.0 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	30.8 m	(101.0 feet)	10 mm	(3/8 inch)
Spinnaker halyard	30.8 m	(101.0 feet)	10 mm	(3/8 inch)
Jib sheet	9.4 m	(31.0 feet)	12 mm	(1/2 inch)
Genoa sheet	9.4 m	(31.0 feet)	12 mm	(1/2 inch)
Mainsheet	23.6 m	(77.5 feet)	12 mm	(1/2 inch)
Spinnaker sheet	20.8 m	(68.2 feet)	12 mm	(1/2 inch)
Cunningham	3.8 m	(12.5 feet)	10 mm	(3/8 inch)
Kickingstrap	7.6 m	(24.9 feet)	10 mm	(3/8 inch)
Clew-outhaul	7.6 m	(24.9 feet)	10 mm	(3/8 inch)

Boat owner's ideas

This section is reserved boat owner's changes, 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 Guyline 95 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

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.