Icing Evaluation. U-21A Airplane with Low Reflective Paint.
An evaluation was conducted of the icing characteristics of a U-21A airplane painted with low reflective paint. Test flights were made in trace, light, and moderate icing conditions. During these tests four shortcomings were noted. The shortcomings were ineffectiveness of the deice boots with rime i...
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ftdtic:ADA046852 2023-05-15T16:37:10+02:00 Icing Evaluation. U-21A Airplane with Low Reflective Paint. Thomas,Charles L Stewart,Robert L Benson,Tom P Woratschek,Ralph ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CALIF 1977-05 text/html http://www.dtic.mil/docs/citations/ADA046852 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA046852 en eng http://www.dtic.mil/docs/citations/ADA046852 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Transport Aircraft Snow Ice and Permafrost Coatings Colorants and Finishes *ICE FORMATION *PAINTS *UTILITY AIRCRAFT LOW LEVEL AERODYNAMIC DRAG LEADING EDGES REFLECTANCE JET ENGINE INLETS DEICING SYSTEMS JET FLAPS U-21A aircraft U-21 aircraft LPN-DA-20-7-R-0083-02-20-EJ Text 1977 ftdtic 2016-02-20T14:39:01Z An evaluation was conducted of the icing characteristics of a U-21A airplane painted with low reflective paint. Test flights were made in trace, light, and moderate icing conditions. During these tests four shortcomings were noted. The shortcomings were ineffectiveness of the deice boots with rime ice accumulation, inability of the engine air inlet anti-ice system to prevent formation of ice in the engine air inlet, lack of an engine inlet lip boot anti-ice system preflight test, and lack of anti-ice/deice capability for the wing area outboard of the pneumatic boots. From the evaluation it was concluded that the low reflective paint does not significantly affect the ice accumulation characteristics of the U-21A airplane, and also that, regardless of the type paint, in moderate icing conditions at constant power, airspeed will be reduced by 20 to 30 knots. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database Rime ENVELOPE(6.483,6.483,62.567,62.567) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Transport Aircraft Snow Ice and Permafrost Coatings Colorants and Finishes *ICE FORMATION *PAINTS *UTILITY AIRCRAFT LOW LEVEL AERODYNAMIC DRAG LEADING EDGES REFLECTANCE JET ENGINE INLETS DEICING SYSTEMS JET FLAPS U-21A aircraft U-21 aircraft LPN-DA-20-7-R-0083-02-20-EJ |
spellingShingle |
Transport Aircraft Snow Ice and Permafrost Coatings Colorants and Finishes *ICE FORMATION *PAINTS *UTILITY AIRCRAFT LOW LEVEL AERODYNAMIC DRAG LEADING EDGES REFLECTANCE JET ENGINE INLETS DEICING SYSTEMS JET FLAPS U-21A aircraft U-21 aircraft LPN-DA-20-7-R-0083-02-20-EJ Thomas,Charles L Stewart,Robert L Benson,Tom P Woratschek,Ralph Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
topic_facet |
Transport Aircraft Snow Ice and Permafrost Coatings Colorants and Finishes *ICE FORMATION *PAINTS *UTILITY AIRCRAFT LOW LEVEL AERODYNAMIC DRAG LEADING EDGES REFLECTANCE JET ENGINE INLETS DEICING SYSTEMS JET FLAPS U-21A aircraft U-21 aircraft LPN-DA-20-7-R-0083-02-20-EJ |
description |
An evaluation was conducted of the icing characteristics of a U-21A airplane painted with low reflective paint. Test flights were made in trace, light, and moderate icing conditions. During these tests four shortcomings were noted. The shortcomings were ineffectiveness of the deice boots with rime ice accumulation, inability of the engine air inlet anti-ice system to prevent formation of ice in the engine air inlet, lack of an engine inlet lip boot anti-ice system preflight test, and lack of anti-ice/deice capability for the wing area outboard of the pneumatic boots. From the evaluation it was concluded that the low reflective paint does not significantly affect the ice accumulation characteristics of the U-21A airplane, and also that, regardless of the type paint, in moderate icing conditions at constant power, airspeed will be reduced by 20 to 30 knots. |
author2 |
ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CALIF |
format |
Text |
author |
Thomas,Charles L Stewart,Robert L Benson,Tom P Woratschek,Ralph |
author_facet |
Thomas,Charles L Stewart,Robert L Benson,Tom P Woratschek,Ralph |
author_sort |
Thomas,Charles L |
title |
Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
title_short |
Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
title_full |
Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
title_fullStr |
Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
title_full_unstemmed |
Icing Evaluation. U-21A Airplane with Low Reflective Paint. |
title_sort |
icing evaluation. u-21a airplane with low reflective paint. |
publishDate |
1977 |
url |
http://www.dtic.mil/docs/citations/ADA046852 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA046852 |
long_lat |
ENVELOPE(6.483,6.483,62.567,62.567) |
geographic |
Rime |
geographic_facet |
Rime |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA046852 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027462541574144 |