The design study for the Trentadue 32 was targeted around the South American offshore IRC championships; what is particularly interesting is how closely Carlini’s race-by-race analysis matches what transpired out on the water. This analysis was further refined by applying the points weighting for the regatta. The finely judged result – five wins inshore, good enough offshore – was well earned
Up to this point, wind speed range has still not been considered.
Now, by incorporating the IRC ratings into our equations, the all-important ‘Cor- rected Time’ table and graphics for each race are obtained, in our case using a TWS range of 6-22kt.
Step 3: race distances and average TWS data
At this stage the distance of each race in our target championship was entered as well as the average TWS estimated previ- ously from the historical statistics. So now each boat can compete in each race with all of the above considerations and in con- sequence the real winner of each race can be determined.
Step 4: final output including regatta points weighting
In this final stage we take account of the different weightings given to each race in our chosen event; combining this informa- tion with all of the previous data inputs allows us to identify performance across our whole ‘virtual’ regatta. So now a final bar chart (above) can be drawn that clearly shows the winning boat of the Rolex Championship sitting nicely in the middle of the range of our five candidate designs (the championship ‘winner’ is represented by boat no3). As a footnote, when this calculation
36 SEAHORSE
was performed for this particular study, it was observed that the virtual winning boat of the championship did not win all of the individual races. And, what’s more, our best design was not even expected to win the most important race of the champi- onship, the 170nm offshore stage which carries the highest points weighting. And in reality? The prototype Trentadue 32 didn’t win that long race, but she did win five out of seven races of the championship along with the trophy itself. Good science can sometimes be particularly rewarding.
Conclusion
This unusually intensive performance study programme took us the best part of two years to complete. But, for the longer term, the study has also given us the tools to further improve our existing design models, which themselves had previously been successful not only for IRC boats, but also when working with other systems like PHRF and ORC. Today we are confident that we can accurately predict rated performance, not only across a single race course but, as we have seen, for the dura- tion of a major regatta.
Trentadue
With the first boat launched last Decem- ber, the Trentadue is a new production IRC racer-cruiser that proved immediately
successful in winning its regatta debut at the Circuito Atlántico Sur Rolex Cup in January 2016.
Innovation and some free thinking have guided this good-looking design, an outside the box concept with avant-garde lines but with the whole carefully tailored to be very competitive under the IRC rating system. The boat is offered by builder Pierma- rine Yachts with a choice of several types of interior, three keel drafts, different rig and rigging configurations as well as sev- eral different deck layouts to meet a wide range of customer requirements. Hull construction is in resin-infused vinylester sandwich with mainly triaxial fibres. The rudder and stock are manufac- tured in carbon/epoxy.
One notable interior option is a rather contemporary (page 35) digital interior LED lighting system, commanded through a touch screen with intelligent control and with the option of remote monitoring syn- chronised via a cell phone; among its many functions the touch screen can deliver dif- fused, coloured ambient LED lighting to a quality that would not disgrace a very decent New York penthouse… Modern, fun and well on the pace. And hopefully not badly priced with base boats now selling at US$135,000. Sebastian Carlini
www.piermarine.com.ar sebacarlini@hotmail.com
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