The Twister 28, a long-keeled sloop, was designed by Kim Holman and built in the UK by Tyler Boat Co Ltd and Uphams Ltd.
Underwater Configuration: Long keel with transom-hung rudder
Hull Material: GRP (Fiberglass)
Length Overall: 28' 3" / 8.6m
Waterline Length: 21' 6" / 6.6m
Beam: 8' 1" / 2.5m
Draft: 5' 0" / 1.5m
Rig Type: Masthead sloop
Displacement: 9,968lb / 4,521kg
Designer: Kim Holman
Builder: Uphams (UK) and Tyler (UK)
Year First Built: 1964
Year Last Built: 1983
Number Built: 200
Owners Association: Twister Class Association
1. Sail Area/Displacement Ratio: 12.1
2. Ballast/Displacement Ratio: 46.4
3. Displacement/Length Ratio: 448
4. Comfort Ratio: 40.5
5. Capsize Screening Formula: 1.5
read more about these all-revealing numbers...
1. A Sail Area/Displacement Ratio of just 12.1 suggests that she'll 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 46.4 means that she'll stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 448, tells us she's firmly in the ultra-heavy displacement category. Load her up as much as you like and her performance will be hardly affected, not that it was ever startling. Few if any sailboats are built to this displacement category these days - but they remain popular with some long-distance sailors.
4. Ted Brewer's Comfort Ratio of 40.5 suggests that crew comfort in a seaway is similar to what you would associate with the motion of a heavy bluewater cruising boat. Pitching and rolling will be well damped - your cup of coffee on the salon table stands a good chance of staying there in reasonable conditions.
5. Her Capsize Screening Formula (CSF) of 1.5 tells us that she would be a safer choice of sailboat an ocean passage than one with a CSF of more than 2.0.
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Mar 26, 23 08:29 AM