Design and Construction
The Dehler 39 represented a sea change in Dehler's design philosophy when she launched, moving the German builder toward a more overtly sporty concept than previous models. The hull form reflects that ambition directly: a nearly plumb bow and minimum overhang aft stretch the waterline to 35 feet, 1 inch on a 38-foot, 9-inch LOA, extracting maximum sailing length from the overall measurement. She carries her beam a long way aft to broad, powerful stern sections, a configuration that delivers stability under press of canvas and helps her drive through rather than over a chop.
Hull construction is hand-laid glass mat and uni- and multidirectional rovings with hydrolysis-proof polyester resin and an end-grain balsa core. Structural bulkheads are bonded to both the hull and deck, and integrated load-bearing stringers disperse loads throughout the hull. The deck itself is a hand-laid balsa-glass sandwich with laminated-in aluminum reinforcement plates for all fittings, and hull and deck are laminated together while still in the mold to create an integrated monocoque structure that inspires immediate confidence offshore. The high-aspect bulb keel combines cast iron and lead, fastened by stainless steel bolts laminated into the floor. The balanced spade rudder is mounted on a solid aluminum shaft with self-aligning JP3 rudder bearings — a detail that repays attention on a boat intended to be driven hard.
Rig and On-Deck Handling
The triple-spreader fractional rig is the defining feature of the 39's deck experience. A tall, three-spreader mast enables her to tack through a close-winded 80 degrees, a genuinely impressive number that translates directly into VMG gains upwind. The 61-foot mast and 1,032 square feet of sail on the wind give her plenty of power even in the light air that can punish heavier designs. A deck-mounted carbon fiber sprit for flying an asymmetrical chute extends the performance envelope downwind without complicating the deck layout.
Hardware is chosen with care. Lewmar 44AST mainsheet winches, Lewmar 48AST primaries, and a Harken mainsheet traveler system handle the loads a loaded-up 39 generates offshore. Chainplates are set inboard, permitting tighter sheeting angles for the headsail, while the Harken adjustable genoa track system allows jib lead adjustment from the cockpit. The big destroyer wheel runs super-smooth Whitlock linkage, and molded-in helming positions to either side mean the driver always has a clear view of the sails regardless of heel angle. A full battery of stoppers mounts to either side for controlling halyards, the topping lift, and control lines — a layout that makes singlehanded sail management genuinely plausible.
Sailing Behavior
On the water, the 39 delivers what the design promises. In testing conditions on Lake Michigan, the speedo quickly jumped to 6 knots in about 15 knots of breeze without half trying. The helm was balanced and the boat tracked easily thanks to its deep keel and big rudder. Under a stiff gust, she demonstrated her sail-carrying ability, heeling gently to her lines with no crew on the rail — the ballast-to-displacement ratio of 42 percent doing its job. Upwind in a chop, she bit into the waves and powered through, holding speed and showing no tendency to pound. Her displacement, which some might consider moderate-heavy for a racer-cruiser, earns its keep in a seaway: ultralight displacement comes at a price in terms of cruising comfort, whereas you want a more substantial boat offshore.
One honest caveat from the Yachting Monthly assessment: she is quite a wet boat when going to windward. The narrow waterline beam and fine entry that enable the close-winded tacking angle come with the standard penalty — a determined bow wave that finds its way aft in short-period chop. Offshore sailors should budget for good foul-weather gear.
Accommodations
Below decks the Dehler 39 trades the busy layouts common among volume builders for a more restrained approach. The test configuration — large V-berth, a saloon with forward-facing nav station to starboard, a head alongside the companionway, and a large quarterberth to port — prioritizes quality of space over quantity of berths. The galley includes a pair of deep sinks, gimbaled oven and stove, plenty of cabinet space, and elegantly crafted solid-cherry fiddles. Both the quarterberth and V-berth have hanging lockers in addition to the usual shelves running along the hull — thoughtful provision that offshore crews will value.
The Yachting Monthly review notes the L-shaped galley and heads are excellent and the forecabin is wonderfully roomy, while acknowledging the saloon is light and airy if a little stark and short on stowage, and the chart table is small. Mirror-image quarterberths aft and a second head compartment were available as factory options, providing flexibility for buyers who prefer a more conventional cruising layout. All wiring and plumbing is carefully organized and easy to access — Dehler designed the systems specifically so that a repair at sea would be as straightforward as possible.
Known Considerations
Two areas reward pre-purchase attention. First, the wet upwind behavior noted above is an inherent characteristic of the hull form rather than a defect — prospective owners should sail her in short-period chop before committing, particularly if the boat will be used for extended coastal passages. Second, the high-gloss cherry veneer below is solid looking but tends to show fingerprints — a minor cosmetic issue that becomes a minor maintenance rhythm rather than a structural concern.
The boat's joinery below and top-grade hardware on deck reflect careful production, but the Judel/Vrolijk design was conceived for performance first. Buyers seeking maximum interior volume relative to LOA will find other designs more accommodating; buyers who want to race well and cruise in comfort without apology will find the tradeoffs intelligently drawn.
Refit Considerations
The hull and deck laminated together while still in the mold create a very stiff monocoque, which simplifies structural assessment on older hulls. The aluminum reinforcement plates laminated in at all deck fittings reduce the risk of osmotic issues around hardware penetrations — a common failure point on production boats of this era. Keel fastening via stainless steel bolts laminated into the floor should be inspected on any older example; the combination of cast iron and lead in the fin is unusual and worth understanding when assessing keel-to-hull joint condition. The self-aligning JP3 rudder bearings are a quality component but will wear with time and should be checked for slop on any used boat. The Dyform wire standing rigging on a triple-spreader fractional rig carries significant loads; older wire should be replaced on schedule.
The Verdict
The Dehler 39 is a coherent, well-executed racer-cruiser from a builder that took German manufacturing standards seriously and applied them to a design with genuine offshore ambition. Judel/Vrolijk drew a fast, close-winded hull; Dehler built it to a hardware and joinery standard that holds up decades later. She is not the most spacious boat at her length, and she will spray you on a beat — but she will also outsail most of what she meets and arrive at the other end with everything intact.
Pros
- Close-winded tacking angle enabled by tall triple-spreader fractional rig
- Solid, engineered construction — monocoque hull-deck joint, balsa-core laminate, quality hardware throughout
- Balanced helm and confident offshore motion despite racer-cruiser displacement
- Galley and forecabin notably well executed for the length
- Accessible systems layout designed for at-sea repair
- Carbon fiber deck sprit broadens downwind sail options
Cons
- Wet upwind in short-period chop — an inherent hull-form characteristic
- Chart table small and saloon stowage limited relative to some contemporaries
- High-gloss cherry interior shows wear and fingerprints readily
- Fine entry and performance tuning demand attentive, experienced helming in strong conditions
