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NACA-TR-820
Propellers in yaw
Year: 1945
Abstract: It was realized as early as 1909 that a propeller in yaw develops a side force like that of a fin. In 1917, R. G. Harris expressed this force in terms of the torque coefficient for the unyawed propeller. Of several attempts to express the side force directly in terms of the shape of the blades, however, none has been completely satisfactory. An analysis that incorporates induction effects not adequately covered in previous work and that gives good agreement with experiment over a wide range of operating conditions is presented. The present analysis shows that the fin analogy may be extended to the form of the side-force expression and that the effective fin area may be taken as the projected side area of the propeller.
Subject: AERODYNAMIC
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:31:26Z | |
| date available | 2017-09-04T18:31:26Z | |
| date copyright | 01/01/1945 | |
| date issued | 1945 | |
| identifier other | IYWUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=author:%22NAVY%20-%206159DD6E273C9FCD0Facil/handle/yse/213683 | |
| description abstract | It was realized as early as 1909 that a propeller in yaw develops a side force like that of a fin. In 1917, R. G. Harris expressed this force in terms of the torque coefficient for the unyawed propeller. Of several attempts to express the side force directly in terms of the shape of the blades, however, none has been completely satisfactory. An analysis that incorporates induction effects not adequately covered in previous work and that gives good agreement with experiment over a wide range of operating conditions is presented. The present analysis shows that the fin analogy may be extended to the form of the side-force expression and that the effective fin area may be taken as the projected side area of the propeller. | |
| language | English | |
| title | NACA-TR-820 | num |
| title | Propellers in yaw | en |
| type | standard | |
| page | 23 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1945 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AIRCRAFT | |
| subject keywords | ASPECT | |
| subject keywords | COMPRESSIBILITY | |
| subject keywords | CONTRAROTATING | |
| subject keywords | EFFECTS | |
| subject keywords | FORCES | |
| subject keywords | INCLINATION | |
| subject keywords | MOMENTS | |
| subject keywords | PITCH | |
| subject keywords | PROPELLERS | |
| subject keywords | RATIO | |
| subject keywords | STABILITY | |
| subject keywords | YAW |