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Model support roll balance and roll coupling. [design of wind tunnel model support mechanism
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sharpes, R. E. Carroll, W. J. |
| Copyright Year | 1973 |
| Description | The design concepts of two specialized wind tunnel model support mechanisms are described. The forced oscillation roll balance mechanism was designed to meet the specific requirement to measure aerodynamic forces and moments to permit determination of the damping-in-roll parameters of winged configurations. A variable speed motor is used to oscillate the model by means of an offset crank. The oscillating motion is resisted by a torsion spring to provide a restoring torque and is attached to the section forward of the strain-gage balance. This spring action allows the model to be oscillated at a frequency for velocity resonance, whereby the mechanical spring and any aerodynamic spring balance. This spring action allows the model to be oscillated at a frequency for velocity resonance, whereby the mechanical spring and any aerodynamic spring balance out the model inertia. The only torque then required to oscillate the model at that particular frequency is equal to that due to aerodynamic damping. The second mechanism, a roll coupling for remotely rotating a model, was designed to invert or roll a model about its longitudinal axis when mounted for testing. |
| File Size | 1656285 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740003568 |
| Archival Resource Key | ark:/13960/t26b1x063 |
| Language | English |
| Publisher Date | 1973-10-01 |
| Access Restriction | Open |
| Subject Keyword | Support Systems Systems Engineering Wind Tunnel Stability Tests Wind Tunnel Models Winged Vehicles Aerodynamic Forces Lateral Control Rolling Moments Flight Simulation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
