Gurney flaps in sailing, do they help?
Floriano Bonfigli - Università degli Studi di Bologna - [2002-03]
The study is about the increasing in the performance of a sailboat, both drift and offshore, with affordable costs. We projected a strip of rigid material, the Gurney flap, placed at right angles along the trailing edge of the aerodynamic and hydrodynamic profiles: sail, drift, rudder and the hull itself. The Gurney flap increases the lift of the profile on which is installed with minimal resistance. After studing all the possibilities we went deeper into evaluating a drift, in particular that of a International14, suitably modified. The last part of the study shows how the new science of computational fluid dynamics can help save time and money in the design of the appropriate Gurney to be installed on the stems.
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