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One Design
Owen Clarke Design presents a mono-type (one design) IMOCA Mono60
mercredi 21 mars 2012 –
Toutes les versions de cet article : [English] [français]
Here are few extracts of their presentation (more here) :
The primary goals include of course producing a yacht with similar performance characteristics to the latest generation 60’s in the existing fleet. A difficult task, since the reducing costs requirement implies that we should also be looking to remove titanium rams, Kevlar honeycomb core and similar elements that are standard on OCD designs. OCD also looked at ways of simplifying the measurement procedure which is currently inaccurate and complicated. Finally a major goal was to improving the reliability of any monotype Monotype #sportboats because that in itself potentially has considerable potential to reduce costs.
Specification
- Pre-preg carbon and Nomex construction
- Stainless steel, twin hydraulic ram system
- Forged high strength stainless steel keel with composite fairings
- Canting keel fixed to max 40 degree cant. No ten degree, simplifies greatly measurement system
- One central aft ballast tank, 1500 litres, One central fwd ballast tank 1500 litres
- Rig, 27m above deck, carbon three spreader rig with discontinuous carbon rigging
- Shorter SPL, J, and I used to calibrate performance in different conditions and control cost/ease of use
- No bowsprit, gennakers and spinnakers tacked off the end of the ‘dreadnought bow’
- Length overall 19.2m
- Beam overall (withheld)
- Draft 4.0 m
- Displacement 8.9 t
Performance : we were able to produce a yacht with the same performance within a few hours on a simplified Vendee Globe course.
Budget costs
Owen Clarke approached two builders, one in the Southern Hemisphere with a specification for the yacht and asked them to produce build costs for new Open 60 designs and an IMOCA Imoca #IMOCA monotype Monotype #sportboats based on the OCD design, including female moulds and on the basis of producing initially three to four boats.
Costs include design, yacht sailing (including first suit of sails/electronics) in Europe (including shipping from New Zealand) up to the end of builder’s trials. What is excluded are project costs such as management, office, salaries, travel and accommodation.
Build, New Zealand (conventional power) - Sailing in Europe at trials : Euro 2,765,417
This compares to the build of a new OCD IMOCA Imoca #IMOCA Open 60 at Southern Ocean Marine Marine Marine nationale , sailing in Europe at sea trials of :
Then, OCD concludes
In boat cost terms alone (ignoring political and commercial considerations which are the domain of IMOCA/sponsors) there seems little incentive from a technical or commercial cost to revert to monotype.
The alternative should also be considered, ie : to tighten up the existing rules by the introduction of some or all of the following :
This is not an exhaustive list of course, but may go a long way to at least restrict the rate of escalating costs. They would also potentially improve a great deal the projects costs from loss/damage, as well as the safety of the fleet.
Full report here : www.owenclarkedesign.com/IMOCA_Monotype_One_Design
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