Guyline 95 Sailboat Review, Specs, and Listings

Guy-Christer Lönngren·1983 – 1990·Guyline
Guyline 95 drawingBuilder drawing
Hull Type
Monohull · wing
Rig
Fractional Sloop
LOA
31' · 9.45 m
Disp.
7,275 lbs · 3,300 kg
First year
1983

The Guyline 95 is a 31foot Finnish sailboat drawn by maritime architect GuyChrister Lönngren in the mid 1980s and built by the yard GCL Design. It is a swingkeeled monohull of modest displacement whose numbers place it firmly in the lightracer class, yet its interior and lifting keel argue for a boat that was meant to do double duty between coastal harbours and inland waterways.

Measurements

Dimensions 01

Length Overall
31 ft
Length on deck
Waterline Length
26.25 ft
Beam
9.84 ft
Draft
7.87 ft
Maximum Headroom
Air Draft

Construction & hull 02

Construction
Fiberglass
Hull Type
Monohull
Keel Type
Wing
Rudder
1× Spade
Ballast
2,425 lbs (Lead)
Displacement
7,275 lbs
Water Capacity
Fuel Capacity

Rig & sails 03

Rigging Type
Fractional Sloop
Mainsail luff
41.67 ft
Mainsail foot
12.47 ft
Foretriangle height
37.4 ft
Foretriangle base
10.83 ft
Forestay Length (estimated)
38.94 ft
Sail Area
462 sqft

Calculations 04

Sail Area to Displacement Ratio
19.69
Ballast to Displacement Ratio
33.33
Displacement to Length Ratio
179.55
Comfort Ratio
19.33
Capsize Screening Ratio
2.03
Hull Speed
6.87 kn

Design and Construction

At 31 feet overall with a 26.25-foot waterline, the Guyline 95 carries 7,275 pounds of displacement against 2,425 pounds of lead ballast, a 33 percent ballast ratio that the recorded figures show as higher than only 14 percent of comparable designs. The lead keel is a pivoting lifting swing keel, which lets the boat settle into shallow marinas at a draft of roughly 4.3 to 4.6 feet dependent on load and also venture well up into inland waters. A length-to-beam ratio of 3.15 makes her beamier than half of all similar sailboats, and the solid fiberglass hull and deck are paired with a spade rudder. Her displacement-length ratio of 180 sorts her among light racers rather than cruisers, and the 160 kg/cm immersion rate (about 900 pounds per inch) tells you how little she sinks for the load carried.

Rig and Handling

The 95 was offered with more than one rig, both fractional sloop configurations, and the sail-plan data show a boat generously canvased for her size. With the ISO reference sail the sail-area-to-displacement ratio is 19.4, rising to 22.3 with a 135 percent genoa, and those figures put her faster in light wind than 86 percent of similar designs. She also carries more rig than 69 percent of her peers, and the relative speed performance index of 79 places her ahead of 79 percent of comparable boats. The theoretical hull speed is 6.9 knots and under a possible 18 hp Yanmar diesel the calculated maximum under power is about 6.0 knots. Halyard and sheet specifications are fully itemised for both fractional options, with 10 mm halyards around 33 metres on the standard rig and 30.8 metres on the alternative, and 12 mm sheets of 9.4 to 23.6 metres depending on lead.

Accommodations

Below, the Guyline 95 is laid out with six berths and headroom described as above average for the class. The beamy hull proportions noted in the design data are what give her that interior room, and the combination of berth count and standing space makes her a credible weekender for a small crew despite the racing-derived displacement numbers.

Performance Envelope and Safety

The capsize screening value comes in at 2.03, a figure that by the standard test would bar the boat from ocean-race acceptance, so she is plainly a coastal and inland boat rather than an offshore campaigner. The motion comfort ratio is 19.2, more comfortable than only 24 percent of similar designs, which is consistent with the light-racer classification and the modest ballast ratio. Buyers should read those numbers as a description of a lively, shallow-draft coastal performer, not a heavy offshore cruiser.

The Verdict

The Guyline 95 is a specialised Finnish design that trades offshore credentials for a lifting lead swing keel and a surprisingly roomy, beamy hull. Her light-racer displacement and high sail-area ratios make her quick in light air and easy to explore shallow waters, while the six berths and good headroom extend her usefulness as a weekender. The same racing lineage, however, leaves her with limited motion comfort and a capsize screen that rules out ocean racing.

Pros

  • Pivoting lifting keel opens coastal and inland waters at 4.3–4.6 ft draft
  • Beamier and more spacious than half of similar designs with six berths
  • Sail-area ratios deliver light-air speed ahead of 86% of peers

Cons

  • Capsize screening of 2.03 excludes ocean-race participation
  • Motion comfort better than only 24% of comparable boats
  • Ballast ratio higher than just 14% of similar designs

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