LOA: 12.20 m
Beam: 3.80 m
Displacement: 3900 kg
Draft: 2.85 m
Draft: 2.85 m
Mainsail Area: 63 m2
Jib Area: 44 m2
Gennaker Area: 184 m2
Seahorse Magazine - July 2013 / by Dobbs Davis.
Riding the wave of popularity in the recent development of Fast Forties, Botin Partners and McConaghy have just teamed up to offer the Botin 40, the latest in this 40-foot genre which offers the high performance and high technology of a custom design and build, but at the great value of a production price.
This is a new direction for Botin, who have shown great success in the last few years with their custom projects in the TP 52, Class 40, GP 42 and VO 70 classes, but have not ventured into production race boat projects in several years. Yet according to Botin’s Adolfo Carrau, the development of the new Botin 40 has been a great experience that has not compromised the quality of the design.
“It would be easy if we could just scale down what we’ve learned from the Azzurra TP52 for this boat,” he said, “but instead we built on that with new CFD and VPP work to develop what is our latest generation hull in a progression of design that started with the ETNZ TP52 in 2009.”
Specifically, the volume distribution, transom immersion and topside angles in the hull design have been reviewed on this boat from the last generation MedCup-winning GP 42’s, with a better balance of performance through all wind speeds and angles. Deck design is focused on keeping low profile to minimize VCG and open up the visibility for the jib trimmers by placing their winches inboard. The mainsheet trimmer is also positioned forward of the helm for better upwind communication, and a Harken pedestal system can manage high-speed kite trimming. To keep the boat dry and reduce construction cost, lines are run above deck wherever possible, and the forward sliding hatch has a pneumatic inflatable seal.
Appendages have also been CFD-developed in concert with the hull design, with the keel made in fabricated high-tensile steel by Kawerau Engineering in NZL. Structural engineering of the boat was done by Pure NZ, led by chief ETNZ structural designer Giovanni Belgrano.
Having built three semi-custom HPR40’s for racing in the US, Mark Evans at McConaghy saw a market niche for a similar boat built of the same materials that could deliver the same performance but be series-produced, with a substantial savings in cost owing to a reduction in man-hours by some 30-40%. This is achieved through some clever techniques used in the build process, and efficient use of carbon pre-preg used to build the skins over the Nomex core in female tooling.
“We worked really hard to streamline our process of building all the components – bulkheads, internal structure, flanges as well as the hull skins – so that in about 2 ½ weeks we can have a hull ready for the deck, and in only 3 months have the whole boat completed.”
This process efficiency and reduced use of fancy features like a retractable propeller system (although this is an option if you want it) result in a base boat price that is kept to under €400K – only 25% more than a non-carbon and heavier Ker 40.
The pre-preg production process at McConaghy has thusfar proved successful with this boat, as Carrau has been impressed with actual weight coming to within 5 kg of the design target weight of 3900 kg. Hull number 1 will be raced inshore and offshore in Japan for a client who is no stranger to high-speed boats, having owned a GP 42 and been active in the Melges 32 circuit.