JPK 39
JPK Composites · Jacques Valer · 2022
Updated
The JPK 39 is a 11.62 m semi-displacement racing yacht designed by Jacques Valer and built by JPK Composites, first launched in 2022. It races in Class B.
Length
11.62 m
38′ 1″
Beam
4.00 m
Draft
2.18 m
Displacement
5.8 t
Sail area
81 m²
On the podium
Where a JPK 39 finishes when she goes racing.
0
Wins
0
Seconds
0
Thirds
1
Starts
Not enough races yet for a percentage — these are the counts so far. We keep collecting results, so this will fill in.
Read from 1 start by 1 boat between 2026, counting races with six boats or more.
Recent regattas
The latest events where a JPK 39 was on the start line, named as the organisers publish them.
Nordseewoche2026
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
—
Not enough data yet: no races of 10 NM or less carry a published distance.
Offshore & coastal
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Not enough data yet: no races over 10 NM carry a published distance.
Who she races against
The designs a JPK 39 actually lines up with, most often first. The bar shows how those meetings ended.
Met too few times for a figure:
J/35 (1 meeting), Tripp 40 (1 meeting), Elan 40 (1 meeting), X-41 (1 meeting), Italia 9.98 (1 meeting), J/88 (1 meeting), Swan 46 (1 meeting), Contessa 35 (1 meeting)
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
5.72
39°
Beam reach
9.47
90°
Broad reach
11.28
135°
Downwind VMG
8.73
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.
It needs pressure to show what it can do. Give it a fresh day and long legs and it delivers more than it promised; in a drifter it is working uphill.
Where it gains
Its best ground is on a broad reach when it blows, where it outruns what it looks like on paper, and by a margin worth having. It holds that advantage running deep 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 0.8 kn either way.
At 10 knots this design makes back more than its rating asks on the upwind.
How fast is a JPK 39
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.85 | 5.24 | 5.61 | 5.72 |
| 52° | 5.95 | 7.60 | 7.98 | 8.13 |
| 60° | 6.32 | 7.80 | 8.23 | 8.46 |
| 75° | 6.56 | 7.97 | 8.62 | 9.01 |
| 90° | 6.55 | 8.01 | 8.81 | 9.47 |
| 110° | 6.16 | 8.15 | 9.21 | 10.43 |
| 120° | 6.02 | 8.06 | 9.29 | 10.94 |
| 135° | 5.42 | 7.65 | 8.86 | 11.28 |
| 150° | 4.56 | 6.82 | 8.15 | 9.83 |
| Run VMG | 3.95 | 5.91 | 7.21 | 8.73 |
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 770 kg.
Rigging
JPK 39 rig and sail dimensions
A JPK 39 carries 14.80 m of mainsail hoist on a 4.98 m boom, a forestay 15.05 m above the deck and a 6.58 m bowsprit. Typical figures across the 3 boats measured under the current VPP, with the range each one spans.
Rig
Sails