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F/A-18E/F experience, to gain insights into the flow physics associated with wing drop, and to develop methods and analytical
tools so that future programs could identify this type of problem before going to flight test. The paper reviews, for the major
goals of the AWS Program, the status of the technology before the program began, the program objectives, accomplishments,
and impacts. Lessons learned are presented for the benefit of future programs that must assess whether a vehicle will have
uncommanded lateral motions before going to flight test. Finally, recommended future research needs are presented in light
of the AWS Program experience.
Author
Wings; Aerodynamic Stalling; Flight Tests; Leading Edges; Flapping
20030031333 NASA Langley Research Center, Hampton, VA, USA
Static Aeroelastic Predictions for a Transonic Transport Model Using an Unstructured-Grid Flow Solver Coupled With
a Structural Plate Technique
Allison, Dennis O.; Cavallo, Peter A.; January 03, 2003; 52 pp.; In English; Original contains black and white illustrations
Contract(s)/Grant(s): WU 719-10-40-10
Report No.(s): NASA/TP-2003-212156; L-18027; NAS 1.60:212156; No Copyright; Avail: CASI; A04, Hardcopy
An equivalent-plate structural deformation technique was coupled with a steady-state unstructured-grid three-dimensional
Euler flow solver and a two-dimensional strip interactive boundary-layer technique. The objective of the research was to assess
the extent to which a simple accounting for static model deformations could improve correlations with measured wing pressure
distributions and lift coefficients at transonic speeds. Results were computed and compared to test data for a wing-fuselage
model of a generic low-wing transonic transport at a transonic cruise condition over a range of Reynolds numbers and dynamic
pressures. The deformations significantly improved correlations with measured wing pressure distributions and lift
coefficients. This method provided a means of quantifying the role of dynamic pressure in wind-tunnel studies of Reynolds
number effects for transonic transport models.
Author
Aeroelasticity; Unstructured Grids (Mathematics); Three Dimensional Flow; Aerodynamic Coeffıcients; Dynamic Pressure;
Pressure Distribution
20030032187 NASA Wallops Flight Center, Wallops Island, VA, USA
An Overview of the NASA Sounding Rocket and Balloon Programs
Eberspeaker, Philip J.; Smith, Ira S.; [2003]; 1 pp.; In English; ESA Symposium, 2-5 Jun. 2003, Switzerland; No Copyright;
Avail: Other Sources; Abstract Only
The U.S. National Aeronautics and Space Administration (NASA) Sounding Rockets and Balloon Programs conduct a
total of 50 to 60 missions per year in support of the NASA scientific community. These missions support investigations
sponsored by NASA’s Offices of Space Science, Life and Microgravity Sciences & Applications, and Earth Science. The
Goddard Space Flight Center has management and implementation responsibility for these programs. The NASA Sounding
Rockets Program provides the science community with payload development support, environmental testing, launch vehicles,
and launch operations from fixed and mobile launch ranges. Sounding rockets continue to provide a cost-effective way to make
in situ observations from 50 to 1500 km in the near-earth environment and to uniquely cover the altitude regime between 50
km and 130 km above the Earth’s surface. New technology efforts include GPS payload event triggering, tailored trajectories,
new vehicle configuration development to expand current capabilities, and the feasibility assessment of an ultra high altitude
sounding rocket vehicle. The NASA Balloon Program continues to make advancements and developments in its capabilities
for support of the scientific ballooning community. The Long Duration Balloon (LDB) is capable of providing flight durations
in excess of two weeks and has had many successful flights since its development. The NASA Balloon Program is currently
engaged in the development of the Ultra Long Duration Balloon (ULDB), which will be capable of providing flight times up
to 100-days. Additional development efforts are focusing on ultra high altitude balloons, station keeping techniques and
planetary balloon technologies.
Author
Balloons; NASA Space Programs; Sounding Rockets; General Overviews
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