The Tayana 47 Sailboat
Specs & Key Performance Indicators
The Tayana 47 cutter was designed by Bob Perry and built in Taiwan by the Ta Yang Yacht Building Co. Ltd. This boat featured here is the centre-cockpit version but they were also produced with a deck-saloon layout.
Published Specification for the Tayana 47
Underwater Configuration: Fin keel with skeg-hung rudder
Hull Material: GRP (Fibreglass)
Length Overall: 47'0" (14.3m)
Waterline Length: 40'3" (12.3m)
Beam: 14'6" (4.4m)
Draft: 6'0" (1.8m)
Rig Type: Cutter
Displacement: 35,000lb (15,876kg)
Designer: Robert Perry
Builder: Ta Yang Yacht Building Co. Ltd (Taiwan)
Year First Built: 1991
Owners Association: www.tognews.com
Published Design Ratios for the Tayana 47
1. Sail Area/Displacement Ratio: 20.7
- 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: 33.4
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 240
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 36.6
- 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 Key Performance Indicators...
Summary Analysis of the Design Ratios for the Tayana 47
1. A Sail Area/Displacement Ratio of 20.7 suggests that, in the right hands, the Tayana 47 will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 33.4 means that the Tayana 47 will have a tendency to heel excessively in a gust, and she'll need to be reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 240, tells us the Tayana 47 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 33.6 suggests that crew comfort of a Tayana 47 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 Tayana 47 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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