Corby 25
LION YACHTS SIA · John Corby · 2000
Updated
The Corby 25 is a 7.71 m heavy displacement racing yacht designed by John Corby and built by LION YACHTS SIA, first launched in 2000. It races in Class C.
Length
7.71 m
25′ 4″
Beam
2.50 m
Draft
1.83 m
Displacement
2.4 t
Sail area
42 m²
On the podium
Where a Corby 25 finishes when she goes racing.
On the podium
13%
of 15 starts by 2 boats
Wins
7%
Read from 15 starts by 2 boats between 2024 and 2026, counting races with six boats or more.
Recent regattas
The latest events where a Corby 25 was on the start line, named as the organisers publish them.
- ORC DH World Championship2026
- ORC DH World Championship2025
Campionato Invernale del Ponente2025
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
0%
of these races end on the podium
Offshore & coastal
—
Not enough data yet: 3 races over 10 NM carry a published distance.
Who she races against
The designs a Corby 25 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
Hanse 510 (7 meetings), Sun Fast 3200 (2 meetings), Platu 25 (2 meetings), J/35 (2 meetings), J/109 (2 meetings), JPK 960 (2 meetings), J/110 (2 meetings), Dehler 36 (Stadt) (2 meetings), JOD 35 (2 meetings), Waarschip 107 (2 meetings), X-332 (1 meeting), J/80 (1 meeting), Salona 34 (1 meeting), Bonin 31 (1 meeting), J/88 (1 meeting), Dufour 34 (1 meeting)
Some of the boats it races against
How the Corby 25 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
4.63
37°
Beam reach
7.22
90°
Broad reach
8.20
135°
Downwind VMG
7.12
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 design is even-tempered. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is on the beat when the breeze is soft, where it outruns what it looks like on paper, 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
It falls short on a reach once it pipes up, giving away time it never gets back. That is weight that has to be driven rather than released.
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 upwind.
How fast is a Corby 25
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.35 | 4.35 | 4.55 | 4.63 |
| 52° | 5.01 | 6.06 | 6.25 | 6.33 |
| 60° | 5.23 | 6.19 | 6.41 | 6.51 |
| 75° | 5.37 | 6.29 | 6.64 | 6.86 |
| 90° | 5.26 | 6.33 | 6.76 | 7.22 |
| 110° | 5.25 | 6.47 | 6.98 | 7.40 |
| 120° | 5.09 | 6.42 | 7.12 | 7.83 |
| 135° | 4.60 | 6.21 | 6.96 | 8.20 |
| 150° | 3.93 | 5.79 | 6.63 | 7.76 |
| Run VMG | 3.41 | 5.07 | 6.13 | 7.12 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. Crew weight is declared around 420 kg.
Rigging
Corby 25 rig and sail dimensions
A Corby 25 carries 9.70 m of mainsail hoist on a 3.60 m boom, a forestay 10.59 m above the deck and a 3.51 m bowsprit. Typical figures across the 5 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 47 to 58 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.