Variable camber rotor study [PDF]
Deployment of variable camber concepts on helicopter rotors was analytically assessed. It was determined that variable camber extended the operating range of helicopters provided that the correct compromise can be obtained between performance/loads gains
Cowan, J., Dadone, L., Mchugh, F. J.
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Recent extensions to the free-vortex-sheet theory for expanded convergence capability [PDF]
A new version of the free vortex sheet formulation is presented which has greatly improved convergence characteristics for a broad range of geometries. The enhanced convergence properties were achieved largely with extended modeling capabilities of the ...
Grantz, A. C. +2 more
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Low-speed wind-tunnel investigation of a large-scale advanced arrow wing supersonic transport configuration with engines mounted above the wing for upper-surface blowing [PDF]
The Langley full scale tunnel was used to investigate the low speed stability and control of an advanced arrow wing supersonic transport with engines mounted above the wing for upper-surface blowing.
Coe, P. L., Jr. +2 more
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Flight control system development and flight test experience with the F-111 mission adaptive wing aircraft [PDF]
The wing on the NASA F-111 transonic aircraft technology airplane was modified to provide flexible leading and trailing edge flaps. This wing is known as the mission adaptive wing (MAW) because aerodynamic efficiency can be maintained at all speeds ...
Larson, R. R.
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Aeroelastic Flutter of Subsonic Aircraft Wing Section with Control Surface
Journal of Engineering, 2015 Aeroelastic flutter in aircraft mechanisms is unavoidable, essentially in the wing and control surface. In this work a three degree-of-freedom aeroelastic wing section with trailing edge flap is modeled numerically and theoretically. FLUENT code based on
Aeroelastic Flutter of Subsonic Aircraft Wing Section with Control Surface +2 more
doaj
Enhancing start-up and torque in Darrieus VAWTs through a novel plain gurney flap design. [PDF]
Sci RepEltayeb W +4 more
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Aerodynamic characteristics of two-dimensional wing configurations at angles of attack near -90 deg [PDF]
Wind tunnel tests were conducted to determine the drag of two-dimensional wing sections operating in a near-vertical flow condition. Various leading- and trialing-edge configurations, including plain flaps of 25, 30, and 35% chord were tested at angles ...
Laub, Georgene +2 more
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Research on Design and Control Method of Flexible Wing Ribs with Chordwise Variable Camber. [PDF]
Biomimetics (Basel)Tao X, Bin L.
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Comparison of aerodynamic theory and experiment for jet-flap wings [PDF]
Aerodynamic theory predictions made for a jet flapped wing were compared with experimental data obtained in a fairly extensive series of tests in the Langley V/STOL tunnel. The tests were made on a straight, rectangular wing and investigated two types of
Gainer, T. G., Vogler, R. P., Yip, L. P.
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Feather aerodynamics suggest importance of lift and flow predictability over drag minimization. [PDF]
Sci RepAlenius F, Revstedt J, Johansson LC.
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