| タイトル | Model support roll balance and roll coupling |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740003568 |
| 著者（英） | Sharpes, R. E.; Carroll, W. J. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1973-10-01 |
| 言語 | eng |
| 内容記述 | 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. |
| NASA分類 | FACILITIES, RESEARCH, AND SUPPORT |
| レポートNO | 74N11681 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/570537 |
