Dehler DB-1 Sailboat Review, Specs, and Listings

E. G. van de Stadt/Cees van Tongeren·1980·Dehler
Dehler DB-1 drawingBuilder drawing
Hull Type
Monohull · fin
Rig
Fractional Sloop
LOA
33.14' · 10.1 m
Disp.
7,275 lbs · 3,300 kg
First year
1980

The Dehler DB1, also documented as the Dehler 3/4 Ton Db1, is a fibreglass monohull sailboat that entered production in 1980 under the longstanding design partnership between Dehler and Dutch naval architect E.G. van de Stadt. With a length overall of just over 33 feet and a waterline of nearly 27 feet, the boat carries 3,525 pounds of lead ballast against a 7,275pound displacement, yielding a ballast ratio recorded at 41 percent — a figure the source material notes is higher than 50 percent of all similar sailboat designs. Those proportions, combined with a lengthtobeam ratio of 2.97 and a fin keel with spade rudder, place the DB1 firmly in the performancecruiser idiom of its era rather than the heavydisplacement tradition.

Measurements

Dimensions 01

Length Overall
33.14 ft
Length on deck
Waterline Length
26.58 ft
Beam
11.18 ft
Draft
6.18 ft
Maximum Headroom
Air Draft

Construction & hull 02

Construction
Fiberglass
Hull Type
Monohull
Keel Type
Fin
Rudder
1× Spade
Ballast
3,525 lbs (Lead)
Displacement
7,275 lbs
Water Capacity
15 gal
Fuel Capacity
11 gal

Rig & sails 03

Rigging Type
Fractional Sloop
Mainsail luff
41 ft
Mainsail foot
14.75 ft
Foretriangle height
36.75 ft
Foretriangle base
11.65 ft
Forestay Length (estimated)
38.55 ft
Sail Area
516 sqft

Calculations 04

Sail Area to Displacement Ratio
21.99
Ballast to Displacement Ratio
48.45
Displacement to Length Ratio
172.95
Comfort Ratio
15.81
Capsize Screening Ratio
2.31
Hull Speed
6.91 kn

Design and Construction

The DB-1's hull is fibreglass, and the keel is lead, built to a solid-laminate standard rather than a cored structure. Dehler's classic production method of the period joined deck and hull as a monocoque bond laminated inside the mold, a technique that eliminated through-bolts and produced a continuous fiberglass joint. The boat's wetted surface is about 32 square meters, and its immersion rate is approximately 184 kg/cm (1,033 lbs/inch), meaning that load-driven changes in trim are predictable and measurable. With a draft that runs about 1.89 to 1.99 meters depending on load, the DB-1 sits at the deeper end of the cruiser spectrum and the source notes she can only enter major marinas given that draft is about 1.89 - 1.99 meter dependent on the load.

Rig and Handling

The DB-1 is rigged as a fractional sloop with a sail area of 516 square feet and a theoretical displacement-hull maximum of 6.9 knots. The documented control-line specification is unusually complete: jib and genoa sheets are called out at 10.1 meters with a 12 mm diameter, the mainsheet at 25.3 meters same diameter, and the spinnaker sheet at 22.2 meters also 12 mm. Those lengths imply a cockpit geometry that accommodates a full-size spinnaker and a traveler-led mainsheet run without recourse to excessively short leads. The 48.45 percent ballast-displacement ratio and 6.18-foot maximum draft give the hull a documented stability profile suited to windward work, though the sources here stop short of attributing handling character beyond the dimensional evidence.

Accommodations

One of the more distinctive documented traits of the DB-1 is interior volume. Compared with other similar sailboats, the design is more spacious than 73 percent of all other designs, a quantitative claim that sets it apart from many narrow-beam performance hulls of the early 1980s. At 11.18 feet of beam against a 33.14-foot LOA, the 2.97 length-to-beam ratio supports that relative roominess without pushing the boat into barge-like proportions. The available documentation does not describe the layout in detail, but the volumetric comparison is itself a design statement: Van de Stadt's lines prioritized livable width within a competitive racer-cruiser envelope.

Known Issues

The supplied documentation contains no reported structural defects, osmotic hull problems, or systemic rigging failures for the DB-1. What the sources do establish are constraints rather than faults: the draft-dependent marina access limitation and the load-sensitive immersion rate. A buyer or owner should treat the 1.89–1.99 meter draft as a hard planning parameter rather than a defect, and the 184 kg/cm immersion figure as a reminder that payload directly alters both draft and performance. No safety-relevant flooding paths or drainage deficiencies are recorded in the available material.

Refits and Ownership

Ownership context shows the DB-1 belongs to Dehler's Van de Stadt generation, before the firm's mid-1990s shift to Judel/Vrolijk partnerships and well before the HanseYachts-era transition to glued-and-bolted deck joints. That lineage matters for refit thinking: the original 1980s monocoque joint is period-correct and not interchangeable with later Dehler systems. The Farymann 22-horsepower diesel and 11-gallon fuel capacity define the mechanical envelope; any repower must respect the original 1.7-ton displacement and 15-gallon water capacity boundaries.

The Verdict

The Dehler DB-1 is a thoroughly documented early-1980s performance cruiser whose numbers tell a coherent story: lead-ballasted, spacious relative to peers, and built to a continuous-laminate standard. She rewards an owner who plans around her draft and treats her payload sensitivity as design fact rather than inconvenience.

Pros

  • More spacious than 73 percent of similar designs per documented comparison
  • Lead keel with ballast ratio higher than 50 percent of comparable sailboats
  • Monocoque hull-to-deck joint built in-mold without through-bolts
  • Complete documented sheet-length specification for all principal sails

Cons

  • Draft of 1.89–1.99 meters limits access to minor marinas
  • Immersion rate of 184 kg/cm means load directly degrades performance margins
  • No documented modern structural reinforcement system as found in later Dehler generations

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