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April 2013 www.sname.org/sname/mt I think my fundamental contribution h as to do with the combination of these isolated equations that identif y the planing characteristics of hulls into one method.? would take hours to do an estimate of a planing hull performance. Well, today the method outline is on a computer and it takes seconds to come up with a com- plete characterization of all these factors that weve talked about as a function of speed. It became very attractive for people to use, avoiding an awful lot of argumentation because now, for the rst time, we had a method to quantify an opinion. WALLING: I still have one of my early homework assign- ments involving using the equations youre talking about to estimate hull resistance and required horse- power. When I came to Stevens, it was very exciting for me to have seen that early in my career and to be working at a facility where you were still working. Is there anything that frustrates you with naval architec- ture today? Is there anything thats not being done that needs to be done? SAVITSKY: Unfortunately, the amount of research thats being put into planing hull technology is substantially reduced from what it used to be during World War II and post-World War II when I was working with Korvin, here at Stevens. eres very little being done, Bob, any- where in the world on planing to the extent that we did planing work years ago. In those days, our direction was mainly with experimental work at the NACA facilities, which were mainly for doing model testing of aircraft and seaplanes and so on. Stevens built a tank here as an experimental approach to hydrodynamics. But as you know these days, all of that is being subdued with the advent of computational uid dynamics (CFD). People are trying to solve, unsuccessfully, hydrodynamic prob- lems of all types using CFD. Many times they come up with startling results, but my own feeling is that its cer- tainly a powerful tool, but its being done at the expense of a decline in experimental work. WALLING: Do you think that tank testing will be phased out by CFD? SAVITSKY: No, not at all because CFD needs corroboration, it needs experimental work, it needs tank work to justify what the CFD has produced. e other day, we were working with a client on a large semi-dis- placement hull. I dont know what the application would be to prototype, but the point of the model test here was to provide data to substantiate the CFD results?even though it was a low Reynolds number, it was still useful to the CFD people. So its going to have a place even in the CFD world, but I think it also has to have a place in Invest in Yourself Increase Your Knowledge Base United States Merchant Marine Academy Master of Science Degree in Marine Engineering Online Based, Distance-Learning Engineering Education Blending graduate level appli cation and theory, focused on advanced concepts in marine engineering. This 36-credit program is designed for working professionals and can be completed without the need to take a job leave of absence or relocate. It consists of seven required courses and five electives. A suitable thesis or design project may be substituted for one or two electives REQUIRED COURSESComputational Methods, Marine Industry Policy, Electrical Power Systems, Advanced Marine Materials, Advanced Marine Power Plants, Thermal System Design & Optimization, Internal Combustion Engine Analysis & New Technologies REPRESENTATIVE ELECTIVES Propulsion & Propulsors, Mari ne Nuclear Propulsion, Power Electronics, Marine Engineering Management, Shipboard Control Systems, Marine Elect rical Systems & Propulsion, Vibration of Marine Machine ry & Structures, Reliability Engineering & Operations Research, Marine Propulsion Systems, Hydrostatics & Basic Hydrodynamics For additional information go to :www.usmma.edu/gradcourse