A New "Free-flight" Mount System for High Speed Wind-Tunnel Flutter Models
Report Number: RTD-TDR-63-4197 Part I, p. 169
Author(s): Reed, Wilmer. H., Abbott, Frank. T.
Corporate Author(s): NASA Langley Research Center
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1964-03
Pages: 37
DoD Task:
Abstract:
Wind-tunnel investigations of aeroelastic models often require that rigid body as well as elastic modes of the test article be simulated. In effect, the mount system must allow the model to be "flown" in the test section and have negligible aerodynamic interference at transonic Mach numbers. Such a system has been developed for flutter and gust response investigations on complete models in the NASA Langley transonic dynamics tunnel. The system consists of a pair of cables which pass through pulleys in the model and run upstream and downstream of the test section in mutually perpendicular planes. Stability and natural frequencies of the cable-supported model are controlled by the preload tension in a spring in one of the cables. The paper describes some evaluation tests and presents a stability analysis which shows the influence of various parameters that govern dynamic characteristics of the system.
Provenance: Bombardier/Aero
Author(s): Reed, Wilmer. H., Abbott, Frank. T.
Corporate Author(s): NASA Langley Research Center
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1964-03
Pages: 37
DoD Task:
Abstract:
Wind-tunnel investigations of aeroelastic models often require that rigid body as well as elastic modes of the test article be simulated. In effect, the mount system must allow the model to be "flown" in the test section and have negligible aerodynamic interference at transonic Mach numbers. Such a system has been developed for flutter and gust response investigations on complete models in the NASA Langley transonic dynamics tunnel. The system consists of a pair of cables which pass through pulleys in the model and run upstream and downstream of the test section in mutually perpendicular planes. Stability and natural frequencies of the cable-supported model are controlled by the preload tension in a spring in one of the cables. The paper describes some evaluation tests and presents a stability analysis which shows the influence of various parameters that govern dynamic characteristics of the system.
Provenance: Bombardier/Aero
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This report is part of the following conference:
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Proceedings of Symposium on Aeroelastic & Dynamic Modeling Technology
RTD TDR 63-4197 Part I