The Tayana 47 Sailboat
Specs & Key Performance Indicators

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

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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.