AUSTRALIA BRISBANE +61.7.3348.7245
andrew@ullmansails.com.au SYDNEY+61.2.9529.8546
bruce@ullmansails.com.au WHITSUNDAY +61.7.4948.3016
whitsunday@ullmansails.com.au
CARIBBEAN ST. MAARTEN +721.544.5231
rgilders@ullmansails.com
TRINIDAD +1.868.634.4178
info@ullmansailstrinidad.com
CROATIA RIJEKA +385.51.288.661
grego@ullmansails.hr
DENMARK AARHUS +45.29.42.05.79
larsbo@ullmansails.dk
parameterisation of the foil geometry inherent in the tool, it is a simple task to add optimisation routines. Applying a cost function based on VPP derivatives of drag and roll moment, design changes such as tip twist and chord distribution can be explored and optimised for the expected operating conditions of the foil. Once these parameters are set, you can automatically create an iges (or any other format) file which can go straight to a CNC or analysis program. Removing the usual multiple steps between the design definition and the analysis tool or the builder has proved both to save time and reduce human error. While the daggerboards and rudders on
Phaedo might not have all of the curves and kinks of the AC72s from the last Cup, their development was directly influenced by the AC72s’ design methods. Using inte- grated geometry definition and analysis tools, the client was able to take advantage of a level of analysis that is not usually applied to projects outside the Cup. Using these methods, the section drag was decreased by 8% at the design cruise condition when compared to old reliable NACA sections.
With the section finalised the composite structural engineering was completed. With first-hand knowledge of how the professionals ‘send it’ on Phaedo, adequate safety factors were maintained within dynamic load cases. Well aware that the engineering did not leave any room for construction abnormalities, Core Compos- ite Builders in New Zealand were selected to fabricate the daggerboards and rudders. Core use an innovative build method that avoids a blind centreline glue bond on each foil. The result of their meticulous attention to detail is an inspired confidence in the appendages as Phaedo blasts through waves at speed.
Overall weight has been reduced in both racing and cruising modes. Solar panels have been stripped from the cabinhouse. Westerly Marine have replaced every
drawer on the boat with featherlight carbon and foam units. Each stainless steel bolt and padeye has been replaced by tita- nium hardware supplied by Ti64. Even the new rudder bearings are titanium. All these small weight reductions have a positive cumulative effect on the boat’s motion and performance.
Overall the boat has lost some 288kg in dry-weight. Probably more important, the vertical centre of gravity has been lowered by 48mm which together with the lighter rig delivers a measurable reduction in pitching and consequent improvement in the aerodynamic efficiency of the sailplan. On most projects the devil is in the details. On Phaedo the pirate is in the details. The boat’s pirate logo can now be found everywhere from the tip of the longeron to the front of the BBQ. No stone was left unturned in terms of finish quality both inside and out. The recognisable Lamborghini Orange has now taken on a metallic blood-orange hue that makes the old colour pallet look tame.
On the first day of sea trials Brian Thompson, Jules Verne record holder on Banque Pop V, was monitoring perfor- mance through the Expedition software on the nav station computer. The numbers that Brian was referencing were the old numbers that matched Phaedo’s perfor- mance perfectly during the Transpac Race before the refit.
We were heading upwind in light air, and it did not take Brian long to proclaim that we were sailing at ‘120% of the old polars’. We cross-referenced the new VPP estimates and, sure enough, 120% made sense. When the Expedition software reminded us how far the boat had come there were high-fives and smiles all around. The Phaedo refit effort was a team effort led by Lloyd Thornburg and managed by Captain Paul Hand. The process was enjoyable, and we have already begun work on the next project. I would like to tell you more, but it is top secret. Stay tuned…
SEAHORSE 47
FRANCE LORIENT +33.0.297.350.723
ceb@ullmansails-atlantique.fr MARSEILLE +33.68.776.8998
pboronat@ullmansailsrsa.com
GERMANY SCHWERIN +49.385.581.33.12
info@ullmansailsne.de
ITALY PARATICO+39.035.917.847
info@ullmangz.it
TRIESTE +39.040.832.3434
ullmansails@ullmansails.it
JAPAN KANAGAWA +81.46.882.2791
info@ullmansails-japan.com
NETHERLANDS BROUWERSHAVEN +31.111.695.222
wgarschagen@ullmansailssouth.nl
NORWAY DRAMMEN +47.32.818.495
peter@ullmansails.no
RUSSIA ST. PETERSBURG +7.921.797.30.11
ullmansails@mail.ru
SOUTH AFRICA CAPE TOWN +27.21.593.1620
warren@ullmansailsrsa.com
DURBAN +27.31.304.5504
c.millar@
ullmansailsrsa.com
SWEDEN SKARHAMN +46.0.730.608.493
info@ullmansails.se
SWITZERLAND ROMANSHORN +41.71.793.1249
info@ullmansails.ch
TURKEY IZMIR +90.232.257.6341
info@ullmansails-turkiye.com
UNITED KINGDOM PLYMOUTH+44.0.1752.550040
chris@ullmansails.co.uk
UNITED STATES OF AMERICA CHESAPEAKE EASTON +1.410.310.7992
msimington@ullmansails.com
DELTAVILLE +1.804.776.6151
jerry@ullmansails.com
GREAT LAKES CLEVELAND +1.216.486.5732
ullmancleveland@aol.com
SOUTH NEW ORLEANS +1.985.626.5638
gulfcoast@ullmansails.com SARASOTA +1.941.951.0189
ullmansails@ullfl.net
WEST COAST HONOLULU+1.808.593.9958
ullmanhi@artnelsonsailmaker.com
SAN DIEGO +1.619.226.1133
sailsinfo@ullmansailssandiego.com SANTA ANA+1.714.432.1860
ullman@ullmansails.com SANTA CRUZ +1.831.454.0868
dhodges@ullmansails.com SEATTLE +1.206.234.3737
sailsinfo@ullmansailsseattle.com VENTURA +1.805.644.9579
ullmanventura1@att.net
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