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NACA-TN-3705
An investigation of forward-located fixed spoilers and deflectors as gust alleviators on an unswept-wing model
Year: 1956
Abstract: An investigation was made in the Langley 300 MPH 7- by 10-foot tunnel and the Langley gust tunnel to determine the static longitudinal aerodynamic characteristics and the gust-alleviation capabilities of forward-located (at 12 percent chord) fixed spoilers, deflectors, or a spoiler-deflector combination on a simulated transport airplane model having an unswept wing.
The lift-curve slopes are fairly linear and are substantially reduced by the addition of either the spoiler or deflector configuration; however, the lift-curve slope was nonlinear for the spoiler-deflector combination. Extending the deflectors necessitates only small changes in attitude and trim in order to maintain a given lift coefficient, whereas extending the spoiler or the spoiler-deflector combination requires large changes.
The lift-curve slopes are fairly linear and are substantially reduced by the addition of either the spoiler or deflector configuration; however, the lift-curve slope was nonlinear for the spoiler-deflector combination. Extending the deflectors necessitates only small changes in attitude and trim in order to maintain a given lift coefficient, whereas extending the spoiler or the spoiler-deflector combination requires large changes.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:20:56Z | |
| date available | 2017-09-04T18:20:56Z | |
| date copyright | 01/01/1956 | |
| date issued | 1956 | |
| identifier other | HXNUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/203412 | |
| description abstract | An investigation was made in the Langley 300 MPH 7- by 10-foot tunnel and the Langley gust tunnel to determine the static longitudinal aerodynamic characteristics and the gust-alleviation capabilities of forward-located (at 12 percent chord) fixed spoilers, deflectors, or a spoiler-deflector combination on a simulated transport airplane model having an unswept wing. The lift-curve slopes are fairly linear and are substantially reduced by the addition of either the spoiler or deflector configuration; however, the lift-curve slope was nonlinear for the spoiler-deflector combination. Extending the deflectors necessitates only small changes in attitude and trim in order to maintain a given lift coefficient, whereas extending the spoiler or the spoiler-deflector combination requires large changes. | |
| language | English | |
| title | NACA-TN-3705 | num |
| title | An investigation of forward-located fixed spoilers and deflectors as gust alleviators on an unswept-wing model | en |
| type | standard | |
| page | 27 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1956 | |
| contenttype | fulltext |