Dibley
Open 40
40' Short-Handed Racing Yacht
Designed
as a short-handed, high performance racing yacht,
the
Dibley 40
also had to be exciting and easily sailed. Designed for
events such as the
Route du Rhum
and across the Atlantic Race – the
‘Transat’,
this design would also favour the shorthanded races such as
the
Melbourne/Osaka
and
Melbourne/Hobart.
The brief for this particular design was interpreted as
follows:
The
hull has been designed to be easily driven. The hull
incorporates a fine
‘U’
shaped entry with narrow waterline but moderate overall
beam and a well-balanced hull volume distribution allowing
superior performance characteristics. The keel cants
50-degrees and to counter leeway, a daggerboard cants
15-degrees in the opposite direction to maximise profile
area and thus minimising leeway. Both Daggerboard and keel
are also lifting allowing access to shallow waters ports.
The canting system is hydraulic with a very high safety
factor built in to counter act the high loads that the
systems can encounter at various times. The cockpit was
designed under the clients brief that he will be spending a
lot of time living on board and sailing to the various
events and so required a cockpit that was as comfortable
racing offshore as it was in port when entertaining guests
and sponsors. The helmsman can steer from either of the
twin 1100 mm-diameter wheels. Tiller steering or one-wheel
options are available, however.
The
carbon,
winged, rotating rig will be engineered by
Chris Mitchell of Applied Engineering
Ltd.
who has been involved in numerous Open 40 , 50 and
60’s as a consultant to various design firms. The
powerful sail area is well balanced with the high righting
moment of this design. A 1.25 metre (4’-1”)
fixed prod has the dual purpose of having a Code Zero on
furler at the end as well as a protruding prod that further
extends 1.25 metre (4’-1”) for the Gennakers.
It is pulled back into the fixed prod from the confines of
the cockpit. The prod caters for a large masthead
asymmetrical spinnaker, as well as a fractional.
The
interior has been designed around the watertight
bulkheads that are a requirement in the
IMOCA
Class Rules. The most important part of the interior is the
Nav station where our client will be spending a lot of his
time going through Data and Navigation info during his
crossings. Opposite the Nav Station is a small Galley, and
aft pipe berths and a comfortable saloon make up the rest
of the internal layout.
Structural Engineering is being done alongside
High Modulus
who will be basing their work in line with
IMOCA Class Rules
including provisions for
ISAF
category ‘0’ and ISO 12215 structural
requirements. Their own in-house safety margins will also
be used where it is deemed necessary.
Overall, this design will cater for single-handed offshore
sailing in a fast hull form with a comfortable layout.
Various alternative layouts can be catered for to suit the
individual, but the current set up suits our client
perfectly.
SPECIFICATIONS
AND PRINCIPAL DIMENSIONS
LOA 12.200 m 40’ - 0”
LWL 12.000 m 39’ - 5”
Overall Beam 3.770 m 12’ - 5”
Draft (board up) 1.500 m 4’ - 11”
Draft (board down) 3.000 m 9’ - 10”
Displacement (1/2 load) 4,600 kg’s 10,140 lbs
J 5.144 m 16’ - 10”
I 15.350 m 50’ - 4”
P 18.000 m 59’ - 1”
E 6.730 m 22’ - 1”
Disp/Length 74
SA/Disp 44.8
Contact Dibley Marine
for more information
