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Static, noise, and transition tests of a combined-surface-blowing v/stol lift/propulsion system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Schaeffer, E. G. Schoen, A. H. Kolesar, C. E. |
| Copyright Year | 1977 |
| Description | Efficient thrust vectoring and high levels of circulatory lift were obtained in tests of a half model V/STOL airplane by using a type of externally blown jet flap in which the jet exhaust from wing-mounted cruise fans is directed over both upper and lower surfaces of a flapped wing. Approximately 90% thrust recovery with 87 deg of thrust vectoring was achieved under static conditions using 89 deg of trailing edge flap deflection. The approximately 10% loss appears to be associated primarily with pressure losses due to the flap brackets or slot entries. The jet induced lift was shown to be 55% of the theoretical value for a fullspan jet-flapped wing, even though only 27.5% of the wingspan was immersed in the jet. Steady rate of descent capability in excess of 1,000 feet per minute is predicted. The possibility of significant aerodynamic-noise cancelling when blowing over both surfaces at high velocities is indicated. |
| File Size | 36870665 |
| Page Count | 254 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770019195 |
| Archival Resource Key | ark:/13960/t5bc8rv9r |
| Language | English |
| Publisher Date | 1977-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Externally Blown Flaps V/stol Aircraft Jet Aircraft Noise Lift Devices Thrust Vector Control Propulsive Efficiency Blowing Aerodynamic Characteristics Static Tests Jet Propulsion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
