Class BPlaningPerformance

G 34

Maxi Dolphin · Jean-Marie Finot · 1999

Updated

The G 34 is a 10.20 m planing racing yacht designed by Jean-Marie Finot and built by Maxi Dolphin, first launched in 1999. It races in Class B.

G 34 - Jean-Marie Finot - Maxi DolphinP 14.65 mLOA 10.20 m

Length

10.20 m

33′ 6″

Beam

3.40 m

Draft

2.06 m

Displacement

3.7 t

Sail area

83 m²

This design does not carry a Race Edge. The speeds below still come from measured boats.

On the podium

Where a G 34 finishes when she goes racing.

0

Wins

0

Seconds

0

Thirds

1

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 1 start by 1 boat between 2021, counting races with six boats or more.

Recent regattas

The latest events where a G 34 was on the start line, named as the organisers publish them.

  • Italy151 Miglia - Trofeo Cetilar2021

Raced one we are missing?

Report a regatta

Round 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: no races of 10 NM or less carry a published distance.

Offshore & coastal

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Not enough data yet: 1 race over 10 NM carry a published distance.

Who she races against

The designs a G 34 actually lines up with, most often first. The bar shows how those meetings ended.

Met too few times for a figure:

Solaris 47 (1 meeting), Swan 42 (1 meeting), Grand Soleil 56 (1 meeting), First 34.7 (1 meeting), Comet 38 (Vallicelli) (1 meeting), Swan 65 (Stephens) (1 meeting), Millenium 45 (1 meeting), Grand Soleil 46 (Carkeek) (1 meeting), Sly 42 (1 meeting), First 40 (1 meeting), Vismara 34 (1 meeting), Comet 45 (1 meeting), Grand Soleil 43 (Carkeek) (1 meeting), X-43 (1 meeting), Grand Soleil 47 (1 meeting), Dufour 44 (1 meeting), X-41 (1 meeting), Grand Soleil 46.3 (1 meeting), Grand Soleil 48 (1 meeting), Sun Fast 3600 (1 meeting), First 47.7 (1 meeting), Elan 380 (1 meeting), IMX 40 (1 meeting), Solaris 44 (1 meeting), J/109 (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.

3691230°60°90°120°150°WIND12.2

Upwind VMG

5.54

39°

Beam reach

10.04

90°

Broad reach

12.15

135°

Downwind VMG

9.04

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.

The stronger it blows, the better this design looks. 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 on a broad reach when it blows, where it goes better than its measurements say it should, and by a margin worth having. It holds that advantage on the run 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.

True wind
Upwind+0.03 kn
Beam reach+0.16 kn
Broad reach+0.07 kn
Downwind-0.03 kn

Full width is 2.2 kn either way.

At 10 knots this design makes back more than its rating asks on the beam reach.

How fast is a G 34

Boat speed in knots, by true wind angle and wind strength.

Angle6 kn10 kn14 kn20 kn
Beat VMG3.664.985.385.54
52°5.597.217.667.92
60°5.907.447.988.37
75°6.137.648.519.18
90°6.037.818.7810.04
110°6.078.059.6211.21
120°5.887.929.6412.15
135°5.277.448.9612.15
150°4.426.618.0210.43
Run VMG3.835.736.969.04

How they are set up

The range each sail spans across the fleet.

Mainsail48 m² – 58 m²
Headsail23 m² – 29 m²
Gennaker76 m² – 80 m²

Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 400 kg.

Rigging

G 34 rig and sail dimensions

A G 34 carries 14.65 m of mainsail hoist on a 5.40 m boom, a forestay 12.00 m above the deck and a 5.90 m bowsprit. Typical figures across the 3 boats measured under the current VPP, with the range each one spans.

Rig

Mainsail hoistP14.65 m14.60 – 14.65
Boom lengthE5.40 m5.20 – 5.40
Forestay heightIG12.00 m12.00 – 12.00
Fore triangle baseJ4.15 m4.10 – 4.15
Spinnaker hoistISP12.70 m12.10 – 12.70
BowspritTPS5.90 m5.40 – 5.90
Boom above deckBAS0.62 m0.62 – 0.80

Sails

Mainsail54.4 m²47.8 – 57.6
Headsail28.5 m²23.1 – 28.5
Gennaker79.9 m²76.3 – 79.9