GLTRS--Glenn
TITLE AND SUBTITLE:
NASA/FAA/NCAR Supercooled Large Droplet Icing Flight Research: Summary of Winter 96-97 Flight Operations

AUTHOR(S):
Dean Miller, Thomas Ratvasky, Ben Bernstein, Frank McDonough,
and J. Walter Strapp

REPORT DATE:
January 1998

FUNDING NUMBERS:
WU-548-20-23-00

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-11054

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-1998-206620
AIAA-98-0577

SUPPLEMENTARY NOTES:
Prepared for the 36th Aerospace Sciences Meeting & Exhibit sponsored by the American Institute of Aeronautics and Astronautics, Reno, Nevada, January 12-15, 1998. Dean Miller and Thomas Ratvasky, NASA Lewis Research Center; Ben Bernstein and Frank McDonough, National Center for Atmospheric Research, Boulder, Colorado; J. Walter Strapp, Atmospheric Environment Services, Downsview, Ontario. Responsible person, Dean Miller, organization code 5840, (216) 433-5349.

ABSTRACT:
During the winter of 1996-97, a flight research program was conducted at the NASA-Lewis Research Center to study the characteristics of Supercooled Large Droplets (SLD) within the Great Lakes region. This flight program was a joint effort between the National Aeronautics and Space Administration (NASA), the National Center for Atmospheric Research (NCAR), and the Federal Aviation Administration (FAA). Based on weather forecasts and real-time in-flight guidance provided by NCAR, the NASA-Lewis Icing Research Aircraft was flown to locations where conditions were believed to be conducive to the formation of Supercooled Large Droplets aloft. Onboard instrumentation was then used to record meteorological, ice accretion, and aero-performance characteristics encountered during the flight. A total of 29 icing research flights were conducted, during which "conventional" small droplet icing, SLD, and mixed phase conditions were encountered aloft. This paper will describe how flight operations were conducted, provide an operational summary of the flights, present selected experimental results from one typical research flight, and conclude with practical "lessons learned" from this first year of operation.

SUBJECT TERMS:
Aircraft icing; Flight research

NUMBER OF PAGES:
26

PDF AVAILABLE FROM URL:
1998/TM-1998-206620.pdf
(1,841,203 KB)
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