The Ovni 43 Sailboat
Specs & Key Performance Indicators
The Ovni 43, an aluminium lifting-keel cutter, was designed by Philippe Briand and built in France by Alubat.
The cockpit of this Ovni 43 is well protected from the tropical sun
Published Specification for the Ovni 43
Underwater Profile: Centreboard & Spade Rudder
Hull Material: Aluminium
Length Overall: 42'4" (12.9m)
Waterline Length: 34'2" (10.4m)
Beam: 14'2" (4.3m)
Draft: 8'3" (2.5m) board down, and 2'7" (0.80m) board up.
Rig Type: Cutter
Displacement: 18,739lb (8,500kg)
Designer: Philippe Briand
Builder: Alubat (France)
Year First Built: 1991
Year Last Built: 2000
Owners Association: Ovni Yacht Owners
Published Design Ratios for the Ovni 43
1. Sail Area/Displacement Ratio: 22.0
- 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: 42.4
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 211
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 23.3
- 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: 2.1
- 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 Ovni 43
1. A Sail Area/Displacement Ratio of 22.0 suggests that, in the right hands, the Ovni 43 will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 42.4 means that the Ovni 43 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 211, tells us the Ovni 43 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 23.3 suggests that crew comfort of a Ovni 43 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 of 2.1 tells us that a xxxx would not be a good choice of sailboat for ocean passage-making, owing to the increased risk of capsize in strong winds and heavy seas when compared to a sailboat with a CSF of less than 2.0.
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