J/133
J/Boats · Rod Johnstone · 2003
Updated
The J/133 is a 13.14 m semi-displacement racing yacht designed by Rod Johnstone and built by J/Boats, first launched in 2003. It races in Class A. Across the measured fleet it goes better than its own numbers promise, ahead of 44% of the designs it races against.
Goes better than its own measurements promise, and does it better than 44% of the boats it races against.
26th of 46 in its class.
Updated — First Race Edge for this design. Enough boats of this design have now been measured on the current scale to rank it.
This design has been found in real race results — 35 starts across 7 events — not only in measurement files.
Length
13.14 m
43′ 1″
Beam
3.87 m
Draft
2.28 m
Displacement
8.8 t
Sail area
104 m²
On the podium
Where a J/133 finishes when she goes racing.
On the podium
9%
of 35 starts by 5 boats
Wins
0%
Read from 35 starts by 5 boats between 2010 and 2024, counting races with six boats or more.
Recent regattas
The latest events where a J/133 was on the start line, named as the organisers publish them.
- ORC World Championship2024
Aegean Regatta2018- North Aegean Cup & National Offshore Championship2018
151 Miglia - Trofeo Cetilar2013- 151 Miglia - Trofeo Cetilar2012
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
11%
of these races end on the podium
Offshore & coastal
6%
of these races end on the podium
Sharper round the buoys. Short courses reward acceleration and manoeuvring, and that is where this design makes its money.
Who she races against
The designs a J/133 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
X-40 (7 meetings), Mumm 36 (7 meetings), Rodman 42 (7 meetings), X-442 (5 meetings), First 35 (Farr) (5 meetings), Hanse 630e (5 meetings), M 34 (5 meetings), First 42 (Farr) (5 meetings), Jv 44 (5 meetings), IMX 38 (5 meetings), X-35 (5 meetings), Mat 101 (5 meetings), Elan 295 (5 meetings), Sly 42 (4 meetings), X-332 (4 meetings), Elan 333 (4 meetings), Dufour 40 (4 meetings), Rimar 36 (4 meetings), First 40.7 (3 meetings), First 44.7 (4 meetings), Canard 41 (3 meetings)
Some of the boats it races against
How the J/133 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
6.06
37°
Beam reach
9.33
90°
Broad reach
11.08
135°
Downwind VMG
8.60
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 does most things without giving much away. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is cracked off in a strong breeze, where it goes better than its measurements say it should, and by a margin worth having. It holds that advantage upwind 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 J/133
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.83 | 5.34 | 5.84 | 6.06 |
| 52° | 5.87 | 7.68 | 8.10 | 8.32 |
| 60° | 6.28 | 7.87 | 8.30 | 8.54 |
| 75° | 6.56 | 8.05 | 8.55 | 8.92 |
| 90° | 6.55 | 8.17 | 8.70 | 9.33 |
| 110° | 6.49 | 8.36 | 9.06 | 9.99 |
| 120° | 6.37 | 8.34 | 9.28 | 10.47 |
| 135° | 5.71 | 8.00 | 9.10 | 11.08 |
| 150° | 4.78 | 7.15 | 8.46 | 9.94 |
| Run VMG | 4.14 | 6.19 | 7.39 | 8.60 |
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 870 kg.
Rigging
J/133 rig and sail dimensions
A J/133 carries 16.44 m of mainsail hoist on a 5.67 m boom, a forestay 17.37 m above the deck and a 7.29 m bowsprit. Typical figures across the 13 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 150 to 212 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.