NASA/FAA/NCAR SUPERCOOLED LARGE DROPLET ICING FLIGHT RESEARCH: SUMMARY OF WINTER 1996-1997 FLIGHT OPERATIONS... NASA/TM-1998-206620... APR.
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Published: 1999*
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Published: 1999*
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Published: 1999
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Published: 1998
Total Pages: 28
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DOWNLOAD EBOOKAuthor: Dean Miller
Publisher:
Published: 1998
Total Pages: 20
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DOWNLOAD EBOOKAuthor: William M. Leary
Publisher:
Published: 2002
Total Pages: 224
ISBN-13:
DOWNLOAD EBOOKThis is the story of a unique facility that has made unparalleled contributions to a specialized area of aeronautics research that affects virtually all who fly.
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Published: 2018-09-19
Total Pages: 54
ISBN-13: 9781723834639
DOWNLOAD EBOOKSupercooled Large Droplet (SLD) icing conditions were implicated in at least one recent aircraft crash, and have been associated with other aircraft incidents. Inflight encounters with SLD can result in ice accreting on unprotected areas of the wing where it can not be removed. Because this ice can adversely affect flight characteristics of some aircraft, there has been concern about flight safety in these conditions. The FAA held a conference on in-flight icing in 1996 where the state of knowledge concerning SLD was explored. One outcome of these meetings was an identified need to acquire SLD flight research data, particularly in the Great Lakes Region. The flight research data was needed by the FAA to develop a better understanding of the meteorological characteristics associated with SLD and facilitate an assessment of existing aircraft icing certification regulations with respect to SLD. In response to this need, NASA, the Federal Aviation Administration (FAA), and the National Center for Atmospheric Research (NCAR) conducted a cooperative icing flight research program to acquire SLD flight research data. The NASA Glenn Research Center's Twin Otter icing research aircraft was flown throughout the Great Lakes region during the winters of 1996-97 and 1997-98 to acquire SLD icing and meteorological data. The NASA Twin Otter was instrumented to measure cloud microphysical properties (particle size, LWC (Liquid Water Content), temperature, etc.), capture images of wing and tail ice accretion, and then record the resultant effect on aircraft performance due to the ice accretion. A satellite telephone link enabled the researchers onboard the Twin Otter to communicate with NCAR meteorologists. who provided real-time guidance into SLD icing conditions. NCAR meteorologists also provided preflight SLD weather forecasts that were used to plan the research flights, and served as on-board researchers. This document contains an evaluation of the tools and techniques NCAR forec
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Published: 2005
Total Pages: 624
ISBN-13:
DOWNLOAD EBOOKAuthor: William Leary
Publisher: CreateSpace
Published: 2014-04-16
Total Pages: 218
ISBN-13: 9781499171167
DOWNLOAD EBOOKThe formation of ice on wings and other control surfaces of airplanes is one of the oldest and most vexing problems that aircraft engineers and scientists continue to face. While no easy, comprehensive answers exist, the staff at NASA's Icing Research Tunnel at the Glenn Research Center in Cleveland has done pioneering work to make flight safer for experimental, commercial, and military consumers.
Author: Robert F. Ide
Publisher:
Published: 2001
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKThe icing research tunnel at the NASA Glenn Research Center underwent a major rehabilitation in 1999, necessitating recalibration of the icing clouds. This report describes the methods used in the recalibration, including the procedure used to establish a uniform icing cloud and the use of a standard icing blade technique for measurement of liquid water content. The instruments and methods used to perform the droplet size calibration are also described. The liquid water content/droplet size operating envelopes of the icing tunnel are shown for a range of airspeeds and compared to the FAA icing certification criteria. The capabilities of the IRT to produce large droplet icing clouds is also detailed.
Author: Richard E. Kreeger
Publisher: BiblioGov
Published: 2013-06
Total Pages: 40
ISBN-13: 9781289051433
DOWNLOAD EBOOKThe aviation industry continues to deal with icing-related incidents and accidents on a regular basis. Air traffic continues to increase, placing more aircraft in adverse icing conditions more frequently and for longer periods. Icing conditions once considered rare or of little consequence, such as super-cooled large droplet icing or high altitude ice crystals, have emerged as major concerns for modern aviation. Because of this, there is a need to better understand the atmospheric environment, the fundamental mechanisms and characteristics of ice growth, and the aerodynamic effects due to icing, as well as how best to protect these aircraft. The icing branch at NASA Glenn continues to develop icing simulation methods and engineering tools to address current aviation safety issues in airframe, engine and rotorcraft icing.