Dehler 34 (Judel/Vrolijk)
Dehler · Judel/Vrolijk · 2016
Updated
The Dehler 34 (Judel/Vrolijk) is a 10.25 m displacement racing yacht designed by Judel/Vrolijk and built by Dehler, first launched in 2016. It races in Class C. Across the measured fleet it goes better than its own numbers promise, ahead of 69% of the designs it races against. It is at its best in light air and struggles to hold that once it blows.
Goes better than its own measurements promise, and does it better than 69% of the boats it races against.
50th of 159 in its class.
This design has been found in real race results — 52 starts across 16 events — not only in measurement files.
Length
10.25 m
33′ 8″
Beam
3.61 m
Draft
1.95 m
Displacement
5.9 t
Sail area
66 m²
On the podium
Where a Dehler 34 (Judel/Vrolijk) finishes when she goes racing.
On the podium
12%
of 52 starts by 9 boats
Wins
2%
Read from 52 starts by 9 boats between 2015 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Dehler 34 (Judel/Vrolijk) was on the start line, named as the organisers publish them.
Jonica 652026- Trofeo TARAS2026
Oslofjorden Rundt2026- Bundefjorden Onsdagsseilaser2026
Björkholmen - Blekholmen2026
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
14%
of these races end on the podium
Offshore & coastal
—
Not enough data yet: 7 races over 10 NM carry a published distance.
Who she races against
The designs a Dehler 34 (Judel/Vrolijk) actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
Aphrodite 101 (7 meetings), Farr 39 (7 meetings), First 33.7 (7 meetings), Elan 310 (6 meetings), Italia 11.98 (6 meetings), Grand Soleil 343 (6 meetings), Grand Soleil 37 (Carkeek) (5 meetings), Melges 32 (5 meetings)
Some of the boats it races against
How the Dehler 34 (Judel/Vrolijk) has fared against each of them, boat against boat on corrected time. Ordered by how often the two meet, not by who wins.
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
5.11
39°
Beam reach
8.25
90°
Broad reach
9.12
135°
Downwind VMG
7.63
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
This design is even-tempered. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is off the wind when the breeze is soft, where it goes better than its measurements say it should. It holds that advantage on a reach as well, so the gain is not down to one leg of the course.
Where it pays
There is no condition where it falls away badly, which is worth something over a season of mixed weather.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 0.4 kn either way.
At 10 knots this design makes back more than its rating asks on the broad reach.
How fast is a Dehler 34 (Judel/Vrolijk)
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.39 | 4.59 | 5.02 | 5.11 |
| 52° | 5.20 | 6.69 | 7.12 | 7.28 |
| 60° | 5.49 | 6.93 | 7.34 | 7.51 |
| 75° | 5.67 | 7.08 | 7.57 | 7.89 |
| 90° | 5.70 | 7.26 | 7.73 | 8.25 |
| 110° | 5.73 | 7.40 | 8.13 | 8.82 |
| 120° | 5.55 | 7.31 | 8.12 | 9.17 |
| 135° | 4.98 | 6.96 | 7.84 | 9.12 |
| 150° | 4.19 | 6.25 | 7.39 | 8.55 |
| Run VMG | 3.63 | 5.41 | 6.62 | 7.63 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 580 kg.
Rigging
Dehler 34 (Judel/Vrolijk) rig and sail dimensions
A Dehler 34 (Judel/Vrolijk) carries 13.25 m of mainsail hoist on a 4.90 m boom, a forestay 13.61 m above the deck and a 4.56 m bowsprit. Typical figures across the 28 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 74 to 116 m² depending on bowsprit and set-up. Before ordering a sail, read the figure on your own measurement record rather than the typical one for the design.
Other designs under the same name
The name has been carried by more than one design. They are different boats.