The Westerly Conway 36 Sailboat
The Westerly Conway 36, a centre-cockpit ketch, was designed by Laurent Giles and built in the UK by Westerly Marine Ltd.
A Westerly Conway centre-cockpit ketch.
Westerly went on to build several other versions on this 36' hull:
- The Solway, like the Conway, was a centre-cockpit but with twin keels;
- The Galway had twin keels and an aft-cockpit;
- The Medway had a deep fin keel and an aft cockpit.
All were available as sloops or ketches.
Published Specification for the Westerly Conway 36
Underwater Profile: Fin keel and skeg-hung rudder
Hull Material: GRP (Fiberglass)
Length Overall: 35'9" (10.90m)
Waterline Length: 30'3" (9.22m)
Beam: 11'2" (3.40m)
Draft: 6'0" (1.83m)
Rig Type: Ketch or sloop
Displacement: 16,182lb (7,316kg)
Designer: Laurent Giles
Builder: Westerly Marine Ltd (UK)
Year First Built: 1975
Year Last Built: 1978
Owners Association: Westerly Owner Association
Published Design Ratios for the Westerly Conway 36
1. Sail Area/Displacement Ratio: Not known
- Less than 16 would be considered under-powered;
- 16 to 20 would indicate reasonably good performance;
- Over 20 suggests relatively high performance.
2. Ballast/Displacement Ratio: 44.4
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 260
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 31.5
- Under 20 indicates a lightweight racing boat
- 20 to 30 indicates a coastal cruiser
- 30 to 40 indicates a moderate offshore cruising boat
- 40 to 50 indicates a heavy offshore boat
- Over 50 indicates an extremely heavy offshore boat
5. Capsize Screening Formula: 1.8
- Under 2.0 (the lower the better): Better suited for ocean passages
- Over 2.0: Less suited for ocean passages
read more about these all-revealing numbers...
Summary Analysis of the Design Ratios for the Westerly Conway 36
1. Her Sail Area/Displacement Ratio of the Westerly Conway 36 isn't known, but word has it she's no slouch.
2. A Ballast/Displacement Ratio of 44.4 means that the Westerly Conway 36 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 260, tells us the Westerly Conway 36 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.
4. Ted Brewer's Comfort Ratio of 31.5 suggests that crew comfort of a Westerly Conway 36 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.
5. The Capsize Screening Formula (CSF) of 1.8 tells us that a Westerly Conway 36 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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