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Aerodynamic characteristics of a hypersonic research airplane concept having a 70 deg swept double-delta wing at mach number 0.2
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Creel Jr., T. R. Dillon, J. L. Penland, J. A. |
| Copyright Year | 1978 |
| Description | A wind-tunnel of the static longitudinal, lateral and directional stability characteristics of a hypersonic research airplane concept having a 70 deg swept double-delta wing was conducted in the Langley low-turbulence pressure tunnel. The configuration variables included wing planform, tip fins, center fin, and scramjet engine modules. A mach number of 0.2 was investigated over a Reynolds number (based on fuselage length) range of 2,200,000 to 19.75 x 1,000,000 (with a majority of tests at 10.0 x 1,000,000. Tests were conducted through an angle-of-attack range from about -2 deg to 34 deg at angles of sideslip of 0 deg to 5 deg, and at elevon deflection of 0 deg, -5 deg, -10 deg, -15 deg, and -20 deg. The drag coefficient of the integrated scramjet engine appears relatively constant with Reynolds number at the test Mach number of 0.2. Mild pitch-up was exhibited by the models equipped with tip fins. The forward delta, a highly swept forward portion of the wing, was destabilizing. The center fin model has a higher trimmed maximum lift-drag ratio and a wider trim lift and angle-of-attack range than the tip fin model. Both the tip fin models and center fin models exhibited positive dihedral effect and positive directional stability. Roll control was positive for the tip fin model, but yaw due to roll control was unfavorable. |
| File Size | 4382273 |
| Page Count | 84 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780023102 |
| Archival Resource Key | ark:/13960/t9h46j260 |
| Language | English |
| Publisher Date | 1978-09-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Static Stability Fins Lateral Stability Yaw Lift Supersonic Combustion Research Aircraft Angle of Attack Lateral Control Mach Number Aerodynamic Drag Ramjet Engines Lift Drag Ratio Reynolds Number Wind Tunnel Stability Tests Wing Planforms Aerodynamic Coefficients Longitudinal Stability Low Turbulence Directional Stability Swept Wings Delta Wings Pressure Measurement Aerodynamic Characteristics Hypersonic Aircraft Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
