EXPERIMENTAL STUDY OF A LOW MODULUS FLUTTER MODEL FOR STRUT-FOIL-POD CONFIGURATIONS.
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 spine and coating of the flutter models were designed so that the elastic axis, the center of gravity, the ratio of torsional stiffness to bending stiffness and the mass density match those of the aluminum Grumman No. 3 strut. The modulus of the model was reduced to scale the model flutter speed at about 1/4 that of the prototype. The rigid pod and foil were hydrodynamically similar to the 'E' configuration. The tested results of the low modulus strut are in good agreement with the 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. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1967
- Accession Number
- AD0663896
Entities
People
- T. T. Huang