A Flight Test Investigation of The Rolling Moments Induced on a T-37B Airplane in The Wake of a B-747 Airplane
Smith, Harriet J. (1975) A Flight Test Investigation of The Rolling Moments Induced on a T-37B Airplane in The Wake of a B-747 Airplane. Technical Report NASA TM X-56031, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
A flight test investigation of the B-747 vortex wake characteristics was conducted using a T-37B as a probe aircraft. The primary purpose of the program was the validation of the results of B-747 model tests which predicted significant alleviation of the vortex strength when only the inboard flaps were deflected. Measurements of the vortex-induced rolling moments of the probe aircraft showed that the predicted alleviation did occur. Unfortunately, this alleviation could not be fully realized for realistic operations: the effects of landing gear extension, increased lift coefficient, idle thrust, and sideslip were investigated, and all had an adverse effect on the alleviated condition as evidenced by increased induced rolling moments of the T-37B probe aircraft. Idle thrust also increased the strength of the B-747 wake vortexes with both inboard and outboard flaps extended.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Wake vortex, Aircraft response, T-37B airplane |
| Subjects: | Aircraft/Project: Boeing 747 (01 - 09) Aeronautics: (01) Aeronautics - General |
| ID Code: | 730 |
| Deposited On: | 15 Febuary 2006 |
| Additional Information: | 23 pages. |
