Ker 11.3
Vision Yachts · Jason Ker · 2001
Updated
The Ker 11.3 is a 11.44 m planing racing yacht designed by Jason Ker and built by Vision Yachts, first launched in 2001. It races in Class B.
Length
11.44 m
37′ 6″
Beam
3.68 m
Draft
2.40 m
Displacement
4.6 t
Sail area
87 m²
On the podium
Where a Ker 11.3 finishes when she goes racing.
On the podium
18%
of 11 starts by 1 boat
Wins
0%
Read from 11 starts by 1 boat between 2021 and 2022, counting races with six boats or more.
Recent regattas
The latest events where a Ker 11.3 was on the start line, named as the organisers publish them.
Storboat Race2022- Alexela ORC World Championship2021
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: 6 races of 10 NM or less carry a published distance.
Offshore & coastal
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Not enough data yet: 2 races over 10 NM carry a published distance.
Who she races against
The designs a Ker 11.3 actually lines up with, most often first. The bar shows how those meetings ended.
Some of the boats it races against
How the Ker 11.3 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
5.99
36°
Beam reach
9.91
90°
Broad reach
12.95
135°
Downwind VMG
10.22
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 is a boat that wants breeze. On a windy coastal course it is in its element; on a light-air windward-leeward it has to be sailed well to hold on.
Where it gains
Its best ground is running deep when it blows, where it does more than its size and sail area promise, and by a margin worth having. It holds that advantage on a broad 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 2.0 kn either way.
At 10 knots this design makes back more than its rating asks on the downwind.
How fast is a Ker 11.3
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 4.12 | 5.43 | 5.82 | 5.99 |
| 52° | 6.24 | 7.64 | 8.04 | 8.28 |
| 60° | 6.56 | 7.83 | 8.31 | 8.62 |
| 75° | 6.79 | 8.02 | 8.69 | 9.23 |
| 90° | 6.81 | 8.08 | 8.86 | 9.91 |
| 110° | 6.78 | 8.44 | 9.39 | 10.70 |
| 120° | 6.65 | 8.49 | 9.74 | 11.59 |
| 135° | 6.00 | 8.13 | 9.66 | 12.95 |
| 150° | 5.03 | 7.34 | 8.70 | 11.80 |
| Run VMG | 4.36 | 6.36 | 7.54 | 10.22 |
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 760 kg.
Rigging
Ker 11.3 rig and sail dimensions
A Ker 11.3 carries 15.35 m of mainsail hoist on a 5.22 m boom, a forestay 15.84 m above the deck and a 6.48 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 — 139 to 160 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.