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NACA-WR-L-447
Wind-tunnel investigation of control-surface characteristics XI - various large overhang and internal-type aerodynamic balances for a straight-contour flap on the NACA 0015 airfoil
Year: 1943
Abstract: Force-test measurements in two-dimensional flow have been made in the NACA 4- by 6-foot vertical tunnel to determine the characteristics of several different shaped overhang-type aerodynamic balances applied to a straight-contour flap mounted on an NACA 0015 airfoil. The chord of the flap was 30 percent of the airfoil chord and the chord of the overhang was 50 percent of the flap chord. Cover plates of several widths were used to cover partly the break in airfoil contour caused by the sharp-nose overhang.
The flap with blunt-nose overhang was overbalanced throughout certain ranges of flap deflection. The hinge-moment characteristics were improved at the expense of increased drag by sharply tapering the nose profile of the overhang. The hinge-moment characteristics of a flap with a long sharp-nose overhang can be nearly reproduced by using a somewhat shorter blunt-nose overhang.
The flap with blunt-nose overhang was overbalanced throughout certain ranges of flap deflection. The hinge-moment characteristics were improved at the expense of increased drag by sharply tapering the nose profile of the overhang. The hinge-moment characteristics of a flap with a long sharp-nose overhang can be nearly reproduced by using a somewhat shorter blunt-nose overhang.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:43:35Z | |
| date available | 2017-09-04T17:43:35Z | |
| date copyright | 01/01/1943 | |
| date issued | 1943 | |
| identifier other | EDVYYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/166630 | |
| description abstract | Force-test measurements in two-dimensional flow have been made in the NACA 4- by 6-foot vertical tunnel to determine the characteristics of several different shaped overhang-type aerodynamic balances applied to a straight-contour flap mounted on an NACA 0015 airfoil. The chord of the flap was 30 percent of the airfoil chord and the chord of the overhang was 50 percent of the flap chord. Cover plates of several widths were used to cover partly the break in airfoil contour caused by the sharp-nose overhang. The flap with blunt-nose overhang was overbalanced throughout certain ranges of flap deflection. The hinge-moment characteristics were improved at the expense of increased drag by sharply tapering the nose profile of the overhang. The hinge-moment characteristics of a flap with a long sharp-nose overhang can be nearly reproduced by using a somewhat shorter blunt-nose overhang. | |
| language | English | |
| title | NACA-WR-L-447 | num |
| title | Wind-tunnel investigation of control-surface characteristics XI - various large overhang and internal-type aerodynamic balances for a straight-contour flap on the NACA 0015 airfoil | en |
| type | standard | |
| page | 38 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1943 | |
| contenttype | fulltext |