The Passoa 47 Sailboat
Specs & Key Performance Indicators
The Passoa 47, an aluminium cutter, was designed by Philippe Harlé & Alain Mortain and built in France by Garcia Aluminium.
A Passoa 47 aluminium cutter
Published Specification for the Passoa 47
Underwater Configuration: Swing-keel/centreboard with twin rudders
Hull Material: Aluminium
Length Overall: 47'9" (14.5m)
Waterline Length: 40'9" (11.9m)
Beam: 14'1" (4.3m)
Draft: Min 3'7" (1.1m), Max 8'2" (2.5m)
Rig Type: Cutter
Displacement: 30,649lb (13,900kg)
Designer: Philippe Harlé & Alain Mortain
Builder: Garcia Aluminium (France)
First Built: 1986
Last Built: 2005
Number Built: 60
Published Design Ratios for the Passoa 47
1. Sail Area/Displacement Ratio: 14.5
- 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: 42.0
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 213
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 29.4
- 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: 1.9
- 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 Passoa 47
1. A Sail Area/Displacement Ratio of 14.5 suggests that the Passoa 47 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 42.0 means that the Passoa 47 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 213, tells us the Passoa 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 29.4 suggests that crew comfort of a Passoa 47 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 1.9 tells us that a Passoa 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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