1,721,015 research outputs found
A Case Study: the Prediction of Seakeeping Performance for an High Speed Catamaran by Classic Strip Theory and High Speed Theory
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Contributes to sailing yacht performance by foil hydrodynamic lift
No full textSince 2000 foils have been fitted to some racing sailing boats with significant results. Several multihulls as well as high performance dinghies use foils and take benefit from hydrodynamic lift. 2013 America’s Cup was sailed almost entirely over the water by foiled catamarans. Recently foil application has been successfully proposed on mono hull ocean racers with low ballast ratio as IMOCA60 s. The foils used on both racing mono and multi-hulls allow benefits on both motion resistance and transversal righting moment through the exploitation of hydrodynamic lift; the vertical component of hydrodynamic force produced by leeward foil(s) takes place of hydrostatic buoyancy, but differently from Archimede’s static force it increases with square speed. Larger righting moment and resistance reduction due to foils result in higher speed. The paper presents a general review of different foil applications on sailing craft and reports detailed characteristics of the most recent trends
High Speed Displacement Crafts: Comparison of Seakeeping and Comfort Characteristics between Monohull and Catamaran
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Sailing dinghy hydrodynamic resistance by experimental and numerical assessments
No full textHull forms of high-performance sailing dinghies are very interesting for yacht designers. After a long period in
which the attention has been focused on one-design boats, in recent years a few exciting restricted classes such as
International Moth, International 14', 18’ Skiff and Class A catamaran become recognized in several countries
and led to interesting advances in high-performance yacht design.
“1001VELAcup R3” class is two people racing dinghy designed according to a box rule with limitation on LOA
and Bmax and total sail area. The boats must be designed and built by students of European Universities and race
yearly in Italy.
This paper focuses on two best-ranked boats “LED” from the University of Palermo and “TryAgain” managed
by the University of Naples but designed by the University of Roma3 team. These boats were definitely superior
as regard motion resistance when tested without appendages during 2017 MIDWINTER INDOOR RACE and,
although very different in main section shape, had comparable performances.
The observed behaviours and the availability of experimental data suggested a suitable numerical approach
and a fair comparison between experimental and numerical results is presented
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