The Westerly 22 Sailboat
Specs & Key Performance Indicators
The Westerly 22, a masthead sloop, was designed by Denis Rayner and built in the UK by Westerly Marine Ltd.
'Belgian', a Westerly 22 pocket cruiser rigged for long offshore passages
Published Specification for the Westerly 22
Underwater Configuration: Bilge keel and skeg-hung rudder
Hull Material: GRP (fibreglass)
Length Overall: 22' 3" / 6.8m
Waterline Length: 18' 4" / 5.6m
Beam: 7' 6" / 2.3m
Draft: 2' 3" / 0.7m
Rig Type: Masthead Sloop
Displacement: 4,150lb / 1,429kg
Designer: Denis Rayner
Builder: Westerly Marine Ltd (UK)
Year First Built: 1963
Year Last Built: 1967
Number Built: 332
Owners Association: Westerly Owners Association
Published Design Ratios for the Westerly 22
1. Sail Area/Displacement Ratio: 17.0
- 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: 33.3
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 228
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 17.0
- 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: 2.1
- 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 22
1. A Sail Area/Displacement Ratio of 17.0 suggests that she'll approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 33.3 means that a sailboat like the Westerly 22 (which doesn't have a stiffness-enhancing bulb keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 228, tells us she's 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 17.0 suggests that crew comfort in a seaway is similar to what you would associate with the motion of a lightweight racing boat. Upwind she'll slam enough to shake your fillings out with a motion that cruising sailors have no desire to get used to.
5. The Capsize Screening Formula (CSF) of 2.1 indicates that a Westerly 22 would not be the wisest choice of sailboat for ocean passage-making owing to the lower resistance to capsize in strong winds and heavy seas that is associated with sailboats with a CSF of 2.0 and above.
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