The Westerly 33, a bilge-keeled masthead sloop, was designed by Laurent Giles and built in the UK by Westerly Yachts Ltd.
Underwater Profile: Bilge keels with Skeg-hung Rudder (Fin Keel version was also produced)
Hull Material: GRP (Fibreglass)
Length Overall: 33'3" (10.1m)
Waterline Length: 28'5" (8.7m)
Beam: 11'2" (3.4m)
Draft: 5'5" (1.7m)
Rig Type: Masthead Sloop (Ketch version was also produced)
Displacement: 14,341lb (6,505kg)
Designer: Laurent Giles
Builder: Westerly Yachts Ltd (UK)
Year First Built: 1975
Year Last Built: 1977
Number Built: 235
Owners Association: Westerly Owners' Association
1. Sail Area/Displacement Ratio: 14.3
2. Ballast/Displacement Ratio: 42.2
3. Displacement/Length Ratio: 277
4. Comfort Ratio: 29.9
5. Capsize Screening Formula: 1.8
read more about these all-revealing numbers...
1. A Sail Area/Displacement Ratio of just 14.3 suggests that the Westerly 33 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.
2. A Ballast/Displacement Ratio of 42.2 means that the Westerly 33 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 277, tells us the Westerly 33 is a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 29.9 suggests that crew comfort of a Westerly 33 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to seasickness.
5. The Capsize Screening Formula (CSF) of 1.8 tells us that a Westerly 33 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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