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Keel & Rudder Analysis
It is well known that without a keel to provide lateral resistance to the sail side-force, a sailboat cannot travel up-wind. It is also well know that high performance sailboat races are often decided by a matter of minutes or seconds. Two objectives of a good keel design are (1) to provide enough sideforce resistance (required for powerful sails) and (2) to reduce the unwanted drag component that impedes the boats forward motion. In the past, predicting the performance of new designs meant using a technical manual (similar to this one) to determine the hydrodynamic properties. A major problem with this approach (other than the obvious time consuming & error prone table manipulation and manual calculations) is the restriction of the design to know cross section shapes and sailing conditions. 3DFoil was developed by Patrick Hanley, Ph.D. to provide reliable hydrodynamic data for new appendage designs for any cross section shape and sailing conditions. 3DFoil also generates the planform shape of tapered keels & rudders and provides the airfoil data needed to fabricate the cross sections. With the reliable analysis found in 3DFoil, you will be able to design a custom keel based your custom specifications in a short period of time. 3DFoil Advantages 3DFoil has the following advantages:
3DFoil Features Use 3DFoil's airfoil analysis tools to:
To size the actual keel, use the 3DFoil planform design & analysis features to:
3DFoil come with a built-in library of NACA 4, 5 & 6-digit airfoils, a cross sectional tool and water data. The full version can be used to read-in and analyze custom airfoils. The software exports tables to .csv files for easy inclusion in spreadsheet programs. It also exports a .stl file that can be imported into other CAD /CAE software packages and used by CNC machines. More information about 3DFoil can be found at: http://www.3dfoil.com
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About Dr. Hanley After graduating from MIT, Dr. Hanley joined the Mechanical Engineering faculty at the University of Connecticut where he formulated and taught courses in aerodynamics, compressible fluids, introductory fluid mechanics and heat transfer. As a faculty member, he won the highly competitive National Science Foundation Research Initiation Award, the NASA-ASEE Summer Faculty Fellowship and three consecutive research awards from NASA Lewis Research center to study compressible viscous flows in turbomachinery using pseudospectral methods. This research led to the successful education of four (4) Ph.D students and four (4) Masters degree students. In addition Dr. Hanley can be credited with a number of publications including the pioneering work in multi-domain pseudospectral methods for compressible viscous flows entitled "A Strategy for the Efficient Simulation of Viscous Compressible Flows using a Multi-domain Pseudospectral Method" which can be found in Journal of Computational Physics, Vol 108, No. 1, pp. 153-158, September 1993. As owner and chief software author of Hanley Innovations, Dr. Hanley has written a number of software packages including AirfoilBrowser, Airfoil Organizer, Science Graphs, VisualFoil, ModelFoil, Aerodynamics in Plain English, Center of Gravity Calculator, WingAnalysis, SmockSoft, PerpeturalPaper amongst other titles. |
