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An experimental investigation of helicopter rotor hub fairing drag characteristics
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Young, L. A. Stroub, R. H. Sung, D. Y. Lance, M. B. |
| Copyright Year | 1989 |
| Description | A study was done in the NASA 14- by 22-Foot Wind Tunnel at Langley Research Center on the parasite drag of different helicopter rotor hub fairings and pylons. Parametric studies of hub-fairing camber and diameter were conducted. The effect of hub fairing/pylon clearance on hub fairing/pylon mutual interference drag was examined in detail. Force and moment data are presented in tabular and graphical forms. The results indicate that hub fairings with a circular-arc upper surface and a flat lower surface yield maximum hub drag reduction; and clearance between the hub fairing and pylon induces high mutual-interference drag and diminishes the drag-reduction benefit obtained using a hub fairing with a flat lower surface. Test data show that symmetrical hub fairings with circular-arc surfaces generate 74 percent more interference drag than do cambered hub fairings with flat lower surfaces, at moderate negative angle of attack. |
| File Size | 1898655 |
| Page Count | 64 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900002385 |
| Archival Resource Key | ark:/13960/t2t48kx86 |
| Language | English |
| Publisher Date | 1989-09-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Performance Tests Drag Reduction Helicopters Rotors Fairings Clearances Hubs Interference Drag Camber Pylons Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
