The Dehler 37 CWS Sailboat
Specs & Key Performance Indicators
The Dehler 37 CWS, a fractionally rigged sloop, was designed by E. G. van de Stadt and built in Germany by Dehler Yachts.
A Dehler 37 CWS (Central Winch System)
Published Specification for the Dehler 37 CWS
Underwater Profile: Fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 36'1" (11.0m)
Waterline Length: 29'6" (9.0m)
Beam: 11'5" (3.5m)
Draft: 5'11" (1.8m)
Rig Type: Fractional sloop
Displacement: 11,684lb (5,300kg)
Ballast: 4,630lb (2,100kg)
Designer: E. G. van de Stadt
Builder: Dehler Yachts (Germany)
Year First Built: 1990
Year Last Built: 1996
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Published Design Ratios for the Dehler 37 CWS
1. Sail Area/Displacement Ratio: 20.8
- 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: 39.6
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 203
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 22.2
- 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 Dehler 37 CWS
1. A Sail Area/Displacement Ratio of 20.8 suggests that, in the right hands, the Dehler 37 CWS will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 39.6 means that a sailboat like the Dehler 37 CWS (which doesn't have a stiffness-enhancing bulb keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 203, tells us the Dehler 37 CWS 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 22.2 suggests that crew comfort of a Dehler 37 CWS in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not the best of news for anyone prone to seasickness.
5. The Capsize Screening Formula of 2.1 tells us that a Dehler 37 CWS would not be as good a 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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