I have been waiting to find pictures of the new 310GL, particularly from the hull, that is a very nice one, but I can't find anything. That's odd because the boat was presented at the Paris boat show and then in Dusseldorf where I visited the boat (and where impressed). It is also selling very well but when I search for Images of Dufour 310 I am overwhelmed with images of the older model and there is a reason for it. The Dufour 31 was one of the greatest designs ever and one that contributed very strongly for the growing of Dufour as a brand.
So, contrary to what is usual I will indulge a bit on boat history and I will look at an old hull before looking to the new one.
The design of the 31 is from Michel Dufour and appeared following the one of a very modern boat for its time, the Arpege (30ft -1966) from the same designer (1500 boats built in 10 years):
ARPEGE 30 (DUFOUR) sailboat specifications and details on sailboatdata.com
The 31 (400 boats built in 6 years):
DUFOUR 31 sailboat specifications and details on sailboatdata.com
This is a 41
year's old design. I bet that at the time it would have looked incredibly modern and I would say fragile to many since the boat only weighted 4355kg and from those 1677kg were ballast in a boat that had an unusually big draft (at the time) for a 31ft boat: 1.73m
The hull should also have appeared very beamy to many and the transom huge (compared with the Arpege - 1st image), as huge and beamy the new 31 GL will look now to many now
To be fair to Michel Dufour there is a much bigger time lapse between the Dufour 31 and the 31Gl than between the 30ft Arpege and the 310GL ( 7 years compared with 40) so in fact the evolution from the Arpege to the 31 is bigger if we take time into consideration.
The beam of the three modes were: 3.02m, 3.20m, 3.31m
The weight: 3493kg, 4355kg, 9940kg
Ballast: 1383kg, 1677kg, 1300kg
The deep draft: 1.40m, 1,73m, 1.90m
The LWL: 6.71m, 7.01m, 8.70m
The sail Area upwind: 35.52m2, 36.74m2, 50.3m2
The much smaller ballast of the new boat shows the importance of draft and of a modern bulbed or torpedo keel in what regards diminishing the weight of needed ballast.
The huge difference in LWL shows the hull evolution on this determinant factor for boat performance and the differences in sail area are proportional to the overall stability and RM of the boats and shows the importance of today's hulls in what regards the contribution of form stability to the overall stability. The increase in weight is somewhat proportional to the increase to the boat hull area and boat volume.
I like very much the Felci designed hull of the 310Gl but only time will tell if it will be as successful as the other two. I doubt since today boat evolution is much faster and the boats become obsolete much faster.
The new 310GL has also a great interior, an amazing one in comfort, interior space and functionality for a 31ft boat:
Don't miss the virtual visit
to the interior:
310 - Grand Large - DUFOUR Yachts