The Caliber 47 LRC Sailboat
Specs & Key Performance Indicators
The Caliber 47 LRC (Long Range Cruiser), a centre cockpit cutter, was designed by Michael McCreary and built in the USA by Caliber Yachts.
A Caliber 47 LRC (Long Range Cruiser)
Published Specification for the Caliber 47 LRC
Underwater Configuration: Fin keel & skeg-hung rudder
Hull Material: GRP (Fibreglass)
Length Overall: 46'10" (14.3m)
Waterline Length: 36'2" (11.0m)
Beam: 13'2" (4.0m)
Draft: 5'3" (1.6m)
Rig Type: Cutter
Displacement: 30,000lb (13,608kg)
Designer: Michael McCreary
Builder: Caliber Yachts (USA)
Year First Built: 1999
Published Design Ratios for the Caliber 47 LRC
1. Sail Area/Displacement Ratio: 15.8
- 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: 39.4
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 239
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 39.0
- 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: 1.6
- 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 Caliber 47 LRC
1. A Sail Area/Displacement Ratio of 15.8 suggests that the Caliber 47 LRC 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 39.4 means that the Caliber 47 LRC will initially stand up reasonably well to her canvas in a moderate breeze, but she'll need a reef in the main to avoid heeling excessively in a gust.
3. A Displacement/Length Ratio of 239, tells us the Caliber 47 LRC 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 39.0 suggests that crew comfort of a Caliber 47 LRC 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 1.6 tells us that a Caliber 47 LRC 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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