Delta 84
Brazzoni · Peracca · 1997
Updated
The Delta 84 is a 8.34 m planing racing yacht designed by Peracca and built by Brazzoni, first launched in 1997. It races in Sportboat.
Length
8.34 m
27′ 4″
Beam
2.68 m
Draft
1.93 m
Displacement
1.2 t
Sail area
41 m²
On the podium
Where a Delta 84 finishes when she goes racing.
On the podium
34%
of 65 starts by 4 boats
Wins
12%
Read from 65 starts by 4 boats between 2018 and 2023, counting races with six boats or more.
Recent regattas
The latest events where a Delta 84 was on the start line, named as the organisers publish them.
Campionato Autunnale della Laguna (Lignano)2023- Sportboat European Championship2022
- Trofeo Marinas (YC Monfalcone)2022
- Trofeo Citta' di Monfalcone (SVOC)2022
- Regata dei Due Golfi (Lignano)2022
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
34%
of these races end on the podium
Offshore & coastal
—
Not enough data yet: 7 races over 10 NM carry a published distance.
Who she races against
The designs a Delta 84 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
First 40.7 (7 meetings), J/112 (7 meetings), Esse 850 (7 meetings), UFO 22 (6 meetings), Sb 20 (6 meetings), Viper 640 (6 meetings), Grand Soleil 44 (Polli) (5 meetings), Sly 42 (5 meetings), T 34 (5 meetings), J/99 (5 meetings), J/109 (5 meetings), First 40 (5 meetings), X-41 (2 meetings)
Some of the boats it races against
How the Delta 84 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
5.07
37°
Beam reach
8.97
90°
Broad reach
12.57
135°
Downwind VMG
10.32
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. 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 downwind in a strong breeze, where it outruns what it looks like on paper, and by a margin worth having. It holds that advantage off the wind 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 wants to get up and go, and needs pressure to do it.
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 3.2 kn either way.
At 10 knots it gives away time on the beam reach — the rating asks more than the boat returns.
How fast is a Delta 84
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.67 | 4.81 | 5.02 | 5.07 |
| 52° | 5.54 | 6.71 | 6.97 | 7.14 |
| 60° | 5.80 | 6.91 | 7.25 | 7.47 |
| 75° | 5.96 | 7.12 | 7.70 | 8.12 |
| 90° | 6.05 | 7.14 | 8.12 | 8.97 |
| 110° | 6.13 | 7.63 | 8.57 | 9.95 |
| 120° | 5.99 | 7.71 | 9.09 | 10.91 |
| 135° | 5.42 | 7.21 | 9.07 | 12.57 |
| 150° | 4.54 | 6.53 | 7.82 | 11.92 |
| Run VMG | 3.93 | 5.68 | 6.78 | 10.32 |
How they are set up
The range each sail spans across the fleet.
Most run a fixed propeller. A bowsprit is standard across the fleet. Crew weight is declared around 460 kg.
Rigging
Delta 84 rig and sail dimensions
A Delta 84 carries 10.72 m of mainsail hoist on a 3.90 m boom, a forestay 9.95 m above the deck and a 3.82 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 — 59 to 78 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.