The Dehler 38 Sailboat
Specs & Key Performance Indicators
The Dehler 38, a fractionally rigged sloop, was designed by Judel/Vrolijk & Co and built in Germany by Dehler Yachts.
A Dehler 38
Published Specification for the Dehler 38
Underwater Profile: Bulb fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 37'1" (11.3m)
Waterline Length: 34'2" (10.4m)
Beam: 12'3" (3.8m)
Draft: 6'7" (2.0m)
Rig Type: Fractional sloop
Displacement: 15,653lb (7,100kg)
Ballast: 4,960lb (2,250kg)
Designer: Judel/Vrolijk & Co
Builder: Dehler Yachts (Germany)
Year First Built: 2013
Dehler 38 Internal Layout
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Published Design Ratios for the Dehler 38
1. Sail Area/Displacement Ratio: 21.9
- 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: 31.7
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 176
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 24.4
- 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: 1.97
- Under 2.0 (the lower the better): Better suited for ocean passages
- Over 2.0: Less suited for ocean passages
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Summary Analysis of the Design Ratios for the Dehler 38
1. A Sail Area/Displacement Ratio of 21.7 suggests that, in the right hands, the Dehler 38 will have enough performance to leave most other sailboats of similar waterline length well astern.
2. A Ballast/Displacement Ratio of 31.7 would usually mean that the Dehler 38 would have a tendency to heel uncomfortably in a gust, and need to be reefed early to keep her sailing upright in a moderate breeze.
However, as she has much of her ballast concentrated in a bulb at the foot of her keel, she's likely to be considerably stiffer than her published Ballast/Displacement Ratio might suggest.
3. A Displacement/Length Ratio of 176 tells us the Dehler 38 is clearly a light displacement sailboat. If she's loaded with too much heavy cruising gear her performance will suffer to a degree.
4. Ted Brewer's Comfort Ratio of 24.4 suggests that crew comfort of a Dehler 38 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 (CSF) of 1.97 indicates that a Dehler 38 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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