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NASA-TN-D-55
Wind-tunnel investigation of longitudinal aerodynamic characteristics of three propeller-driven VTOL configurations in the transition speed range, including effects of ground proximity
Year: 1960
Abstract: An investigation has been made in the 17-foot test section of the Langley 300-MPH 7- by 10-foot tunnel to determine the longitudinal aerodynamic characteristics of tilt-wing, deflected-slipstream, and combination tilt-wing - deflected-slipstream VTOL configurations in the transition speed range.
The results of this investigation are in general agreement with prior related investigations in that although the tilt-wing configuration requires the least power in hovering, the combination tilt-wing-deflected-slipstream configuration has relatively low power requirements throughout the transition speed range. In addition, the longitudinal trim problems of the combination configuration can be handled easily by use of a rearward location of the wing pivot and by properly programing the flap deflection angle with wing tilt angle.
The results of this investigation are in general agreement with prior related investigations in that although the tilt-wing configuration requires the least power in hovering, the combination tilt-wing-deflected-slipstream configuration has relatively low power requirements throughout the transition speed range. In addition, the longitudinal trim problems of the combination configuration can be handled easily by use of a rearward location of the wing pivot and by properly programing the flap deflection angle with wing tilt angle.
Subject: AERODYNAMIC
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:18:36Z | |
| date available | 2017-09-04T15:18:36Z | |
| date copyright | 01/01/1960 | |
| date issued | 1960 | |
| identifier other | MQTKAEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/18294 | |
| description abstract | An investigation has been made in the 17-foot test section of the Langley 300-MPH 7- by 10-foot tunnel to determine the longitudinal aerodynamic characteristics of tilt-wing, deflected-slipstream, and combination tilt-wing - deflected-slipstream VTOL configurations in the transition speed range. The results of this investigation are in general agreement with prior related investigations in that although the tilt-wing configuration requires the least power in hovering, the combination tilt-wing-deflected-slipstream configuration has relatively low power requirements throughout the transition speed range. In addition, the longitudinal trim problems of the combination configuration can be handled easily by use of a rearward location of the wing pivot and by properly programing the flap deflection angle with wing tilt angle. | |
| language | English | |
| title | NASA-TN-D-55 | num |
| title | Wind-tunnel investigation of longitudinal aerodynamic characteristics of three propeller-driven VTOL configurations in the transition speed range, including effects of ground proximity | en |
| type | standard | |
| page | 129 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1960 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AERODYNAMICS | |
| subject keywords | AIRCRAFT | |
| subject keywords | CHARACTERISTICS | |
| subject keywords | CONFIGURATIONS | |
| subject keywords | EFFECT | |
| subject keywords | GROUND | |
| subject keywords | PROPELLERS | |
| subject keywords | TAKEOFF | |
| subject keywords | TESTS | |
| subject keywords | TUNNEL | |
| subject keywords | VERTICAL | |
| subject keywords | WIND |