The Rustler 42 Sailboat
Specs & Key Performance Indicators
The Rustler 42 cutter was designed by Stephen Jones and built in the UK by Rustler Yachts Ltd.
Note the hanked-on staysail on this Rustler 42 which enables a storm jib to be set when needed.
Published Specification for the Rustler 42
Underwater Profile: Fin and skeg-supported rudder
Hull Material: GRP (Fiberglass)
Length Overall: 42'0" (12.8m)
Waterline Length: 33'5" (10.2m)
Beam: 13'4" (4.1m)
Draft: 6'2" (1.9m)
Rig Type: Cutter
Displacement: 26,000lb (11,794kg)
Designer: Stephen Jones
Builder: Rustler Yachts Ltd (UK)
Year First Built: 1999
Published Design Ratios for the Rustler 42
1. Sail Area/Displacement Ratio: 17.4
- 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: 40.0
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 309
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 35.4
- 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: 1.8
- 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 Rustler 42
1. A Sail Area/Displacement Ratio of 17.4 suggests that the Rustler 42 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 40.0 means that the Rustler 42 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 309, tells us the Rustler 42 is clearly a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 35.4 suggests that crew comfort of a Rustler 42 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 Rustler 42 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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