In-flight Demonstration of a Real-Time Flush Airdata Sensing (RT-FADS) System
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Page : 24 pages
File Size : 15,55 MB
Release : 1995
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Page : 24 pages
File Size : 15,55 MB
Release : 1995
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Author : Brent R. Cobleigh
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Page : 34 pages
File Size : 34,90 MB
Release : 1999
Category : Aeronautical instruments
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Blunt-forebody pressure data are used to study the behavior of the NASA Dryden Flight Research Center flush airdata sensing (FADS) pressure model and solution algorithm. The model relates surface pressure measurements to the airdata state. Spliced from the potential flow solution for uniform flow over a sphere and the modified Newtonian impact theory, the model was shown to apply to a wide range of blunt-forebody shapes and Mach numbers. Calibrations of a sphere, spherical cones, a Rankine half body, and the F-14, F/A-18, X-33, X-34, and X-38 configurations are shown. The three calibration parameters are well-behaved from Mach 0.25 to Mach 5.0, an angle-of-attack range extending to greater than 30 deg., and an angle-of-sideslip range extending to greater than 15 deg. Contrary to the sharp calibration changes found on traditional pitot-static systems at transonic speeds, the FADS calibrations are smooth, monotonic functions of Mach number and effective angles of attack and sideslip. Because the FADS calibration is sensitive to pressure port location, detailed measurements of the actual pressure port locations on the flight vehicle are required and the wind-tunnel calibration model should have pressure ports in similar locations. The procedure for calibrating a FADS system is outlined.
Author : Stephen A. Whitmore
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Page : 38 pages
File Size : 43,80 MB
Release : 1998
Category : Aerodynamic measurements
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Author : Stephen A. Whitmore
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Page : 22 pages
File Size : 32,65 MB
Release : 1993
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Author : Stephen A. Whitmore
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Page : 28 pages
File Size : 30,38 MB
Release : 1992
Category : Aerodynamic measurements
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Page : 34 pages
File Size : 28,56 MB
Release : 1991
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Author : Stephen A. Whitmore
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Page : 18 pages
File Size : 21,99 MB
Release : 1990
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Page : 340 pages
File Size : 48,86 MB
Release : 1992
Category : Aeronautics
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Author : Joel R. Sitz
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Page : 36 pages
File Size : 35,16 MB
Release : 1992
Category : Aeronautics
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Author : Timothy R. Moes
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Page : 146 pages
File Size : 29,45 MB
Release : 2000
Category : Airplanes
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