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NACA-TN-3245
Calculated subsonic span loads and resulting stability derivatives of unswept and 45 degrees sweptback tail surfaces in sideslip and in steady roll
Year: 1954
Abstract: Subsonic span loads and the resulting stability derivatives have been calculated for a systematic series of vertical- and horizontal-tail combinations in sideslip and in steady roll in order to provide information embracing a wide range of probable tail configurations. All calculations were made by application of the discrete-horseshoe-vortex method to the problem of estimating loads on intersecting surfaces. The investigation covered variations in vertical-tail aspect ratio, the ratio of horizontal-tail aspect ratio to vertical-tail aspect ratio, the effects of horizontal-tail dihedral angle (for the sideslip case), and the effects of vertical position of the horizontal tail for surfaces having their quarter-chord lines swept back 0° and 45°. The results of the investigation are presented in charts from which the span loads for the various conditions can be obtained. The resulting stability derivatives are presented as vertical- and horizontal-tail contributions as well as total-tail-assembly derivatives.
The results of this investigation, which was made for a wider range of geometric variables than previous studies, showed trends which were in general agreement with the results of previous investigations. Also presented in this paper and used in the computations is an extensive table of values of sidewash due to a rectangular vortex.
The results of this investigation, which was made for a wider range of geometric variables than previous studies, showed trends which were in general agreement with the results of previous investigations. Also presented in this paper and used in the computations is an extensive table of values of sidewash due to a rectangular vortex.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:14:09Z | |
| date available | 2017-09-04T16:14:09Z | |
| date copyright | 01/01/1954 | |
| date issued | 1954 | |
| identifier other | STNUYDAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/77453 | |
| description abstract | Subsonic span loads and the resulting stability derivatives have been calculated for a systematic series of vertical- and horizontal-tail combinations in sideslip and in steady roll in order to provide information embracing a wide range of probable tail configurations. All calculations were made by application of the discrete-horseshoe-vortex method to the problem of estimating loads on intersecting surfaces. The investigation covered variations in vertical-tail aspect ratio, the ratio of horizontal-tail aspect ratio to vertical-tail aspect ratio, the effects of horizontal-tail dihedral angle (for the sideslip case), and the effects of vertical position of the horizontal tail for surfaces having their quarter-chord lines swept back 0° and 45°. The results of the investigation are presented in charts from which the span loads for the various conditions can be obtained. The resulting stability derivatives are presented as vertical- and horizontal-tail contributions as well as total-tail-assembly derivatives. The results of this investigation, which was made for a wider range of geometric variables than previous studies, showed trends which were in general agreement with the results of previous investigations. Also presented in this paper and used in the computations is an extensive table of values of sidewash due to a rectangular vortex. | |
| language | English | |
| title | NACA-TN-3245 | num |
| title | Calculated subsonic span loads and resulting stability derivatives of unswept and 45 degrees sweptback tail surfaces in sideslip and in steady roll | en |
| type | standard | |
| page | 111 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1954 | |
| contenttype | fulltext |