Examination of derived gust velocities from C-130 in forest service operation

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Authors
Kliment, Linda K.
Rokhsaz, Kamran
Ali, Syed Junaid
Nelson, John A.
Issue Date
2022-06-20
Type
Conference paper
Language
en_US
Keywords
Airframes , Boeing 747 , Digital flight data recorder , Equivalent airspeed , Takeoff and landing , Flight phases , Aerodynamic center , Atmospheric turbulence , Pressure altitude , Flap deflection
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Abstract

Flight data from two EC-130Q and two L-382G airframes being flown as airtankers in USFS operations were analyzed. Firefighting flights were separated into five phases: cruise 1, entry, drop, exit, and cruise 2. The recorded normal accelerations were used to calculate the derived gust velocities and the results were presented for each phase. Results showed that the frequency of the atmospheric gusts were dependent on MSL altitude. Because the cruise phases were flown at higher altitudes, the derived gust velocities occurred more frequently for the entry, drop, and exit phases. Likewise, derived gust velocities occurred more frequently for the firefighting missions due to the ferry flights occurring at higher altitudes. The results presented in this paper compared favorably with those observed for other airtankers.

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Work created by the federal government is in the public domain. This effort was funded by the United States Forest Service through the Grant 17-G-004 administered by the Federal Aviation Administration.
Citation
Linda K. Kliment, Kamran Rokhsaz, Syed Junaid Ali and John Nelson. "Examination of Derived Gust Velocities from C-130 in Forest Service Operation," AIAA 2022-4153. AIAA AVIATION 2022 Forum. June 2022.
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American Institute of Aeronautics and Astronautics, Inc.
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