JPK 38
JPK Composites · Jacques Valer · 2010
Updated
The JPK 38 is a 11.40 m semi-displacement racing yacht designed by Jacques Valer and built by JPK Composites, first launched in 2010. It races in Class B.
Length
11.40 m
37′ 5″
Beam
3.99 m
Draft
2.70 m
Displacement
5.3 t
Sail area
77 m²
On the podium
Where a JPK 38 finishes when she goes racing.
On the podium
0%
of 12 starts by 1 boat
Wins
0%
Read from 12 starts by 1 boat between 2026, counting races with six boats or more.
Recent regattas
The latest events where a JPK 38 was on the start line, named as the organisers publish them.
Nordstadtwerke-Cup2026- Im-Jaich-Cup2026
- Miar2026
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
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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 38 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
Comfortina 35 (7 meetings), X-362 (6 meetings), Seaquest 36 (5 meetings), X-332 (3 meetings), X-342 (2 meetings), Pogo 36 (2 meetings), Sun Fast 36 (1 meeting)
Some of the boats it races against
How the JPK 38 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
5.78
37°
Beam reach
9.28
90°
Broad reach
11.05
135°
Downwind VMG
8.36
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.
The stronger it blows, the better this design looks. 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 off the wind once it pipes up, where it does more than its size and sail area promise, and by a margin worth having. It holds that advantage on the run as well, so the gain is not down to one leg of the course.
Where it pays
It falls short upwind in light air, giving away time it never gets back.
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 1.0 kn either way.
At 10 knots this design makes back more than its rating asks on the beam reach.
How fast is a JPK 38
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.52 | 4.96 | 5.58 | 5.78 |
| 52° | 5.44 | 7.23 | 7.78 | 8.10 |
| 60° | 5.76 | 7.45 | 8.02 | 8.37 |
| 75° | 5.97 | 7.60 | 8.30 | 8.78 |
| 90° | 5.92 | 7.81 | 8.47 | 9.28 |
| 110° | 6.07 | 8.02 | 8.97 | 10.22 |
| 120° | 5.92 | 7.93 | 9.11 | 11.02 |
| 135° | 5.31 | 7.53 | 8.72 | 11.05 |
| 150° | 4.46 | 6.70 | 8.01 | 9.66 |
| Run VMG | 3.86 | 5.81 | 6.98 | 8.36 |
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 620 kg.
Rigging
JPK 38 rig and sail dimensions
A JPK 38 carries 14.55 m of mainsail hoist on a 4.95 m boom, a forestay 15.15 m above the deck and a 5.90 m bowsprit. Typical figures across the 3 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 119 to 145 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.