Abstract
The results of an experimental investigation of three low-modulus built-up struts with several rigid pods and foil configurations are presented. The scaled model struts were constructed using a copper alloy spine coated with an extremely low-modulus silicone rubber. The model was designed to reduce the model flutter speed to about that of the prototype. The test results for the low-modulus strut are in good agreement with scaled values from the prototype. In addition, a series of flutter tests were conducted to study the effects of strut sweep angle, strut submergence, pod weight, and foil angle of attack and dihedral on the flutter characteristics of the strut. The developed modeling technique may reliably be used to solve the practical hydrodynamic flutter problems and may serve as a guide for the future development of a useful theory which is presently unavailable.
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