Justin Ten
Justin · Andrej Justin · 1996
Updated
The Justin Ten is a 9.99 m semi-displacement racing yacht designed by Andrej Justin and built by Justin, first launched in 1996. It races in Class C.
Length
9.99 m
32′ 9″
Beam
3.32 m
Draft
2.27 m
Displacement
2.4 t
Sail area
65 m²
On the podium
Where a Justin Ten finishes when she goes racing.
0
Wins
0
Seconds
1
Thirds
2
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 2 starts by 1 boat between 2019 and 2020, counting races with six boats or more.
Recent regattas
The latest events where a Justin Ten was on the start line, named as the organisers publish them.
Regata Dan Državnosti2020- Regate di allenamento JK Orsan2019
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: 2 races of 10 NM or less carry a published distance.
Offshore & coastal
—
Not enough data yet: no races over 10 NM carry a published distance.
Who she races against
The designs a Justin Ten actually lines up with, most often first. The bar shows how those meetings ended.
Met too few times for a figure:
Elan 340 (2 meetings), Fiumanka 33 (2 meetings), Melges 24 (2 meetings), Salona 40 (2 meetings), Seascape 27 (2 meetings), Sydney 40 (2 meetings), Elan 31 (Design) (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
5.46
37°
Beam reach
9.43
90°
Broad reach
13.09
135°
Downwind VMG
9.83
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 on a broad reach 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 downwind as well, so the gain is not down to one leg of the course.
Where it pays
It falls short on the beat once it pipes up, giving away time it never gets back. That is a hull that will lift and run given enough breeze.
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 3.0 kn either way.
At 10 knots this design makes back more than its rating asks on the upwind.
How fast is a Justin Ten
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 4.00 | 5.16 | 5.39 | 5.46 |
| 52° | 6.01 | 7.21 | 7.47 | 7.64 |
| 60° | 6.28 | 7.42 | 7.75 | 7.97 |
| 75° | 6.45 | 7.67 | 8.21 | 8.60 |
| 90° | 6.42 | 7.75 | 8.62 | 9.43 |
| 110° | 6.37 | 8.10 | 9.15 | 10.57 |
| 120° | 6.19 | 8.04 | 9.65 | 11.57 |
| 135° | 5.57 | 7.54 | 9.20 | 13.09 |
| 150° | 4.66 | 6.82 | 8.12 | 11.35 |
| Run VMG | 4.04 | 5.91 | 7.04 | 9.83 |
How they are set up
The range each sail spans across the fleet.
Roughly half carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 530 kg.
Rigging
Justin Ten rig and sail dimensions
A Justin Ten carries 13.77 m of mainsail hoist on a 4.53 m boom, a forestay 13.46 m above the deck and a 5.19 m bowsprit. Typical figures across the 2 boats measured under the current VPP, with the range each one spans.
Rig
Sails