Artificial and Natural Icing Test of the YCH-47D

The YCH-47D helicopter icing test was conducted between 4 February and 28 March 1980. Twenty flights were conducted, seven in the artificial environment, eleven in natural icing and two flights in heavy snow. A total of 35 hours were flown with 17.4 hours in the icing environment. Testing was conduc...

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Bibliographische Detailangaben
Hauptverfasser:	Adam,Charles F, Bowers,Frame J , III, Abbott,William Y
Format:	Report
Sprache:	eng
Schlagworte:	Antiice systems Artificial icing CH-47D aircraft COLD WEATHER TESTS DEICING SYSTEMS ENVIRONMENTAL TESTS FUEL TANKS Full tank vent icing HEATERS HELICOPTER ENGINES Helicopters ICE FORMATION LPN-DA-19-9-BK100-01-1K-19 METHODOLOGY Natural icing ROTOR BLADES(ROTARY WINGS) Test Facilities, Equipment and Methods WINDSHIELDS YCH-47D helicopters
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Beschreibung
Zusammenfassung:	The YCH-47D helicopter icing test was conducted between 4 February and 28 March 1980. Twenty flights were conducted, seven in the artificial environment, eleven in natural icing and two flights in heavy snow. A total of 35 hours were flown with 17.4 hours in the icing environment. Testing was conducted at St. Paul, Minnesota, in two phases: (1) protected (the deice system operated automatically) in the artificial environment and (2) unprotected (the deice system in a standby status), both in the artificial and natural environment. The YCH-47D was evaluated at conditions varying from 0.1 to 1.5 gm/m cube liquid water content (LWC) and temperatures varying from -2 degrees C to -20 degrees C. Maximum time for an individual flight in the natural environment was 95 minutes at an average LWC of 0.2 gm/m cube and -10 degrees C.