| Climatic Laboratory Evaluation YCH-47D Helicopter |
AUG 1981 |
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| Authors:
John R. Niemann; Charles F. Adam; Jerry A. Brown; ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA
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 | The United States Army Aviation Engineering Flight Activity conducted a climatic laboratory evaluation of the Boeing Vertol YCH-47D helicopter. Approximately 17-1/2 hours of aircraft operating time and 22 test runs were required to complete the test. The YCH-47D systems, subsystems and components were evaluated at stabilized temperatures ranging from -65 F to +125 F. In some cases, inconclusive results were obtained at the colder temperatures because the test was conducted ... |
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| Preliminary Airworthiness Evaluation (PAE 1) of the YCH-47D Helicopter. |
MAY 1980 |
151 pages |
| Authors:
Grady W. Wilson; Charles F. Adam; Stuart F. Arthur; John R. Niemann; Frame J. Bowers; ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA
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 | The Preliminary Airworthiness Evaluation of the YCH-47D helicopter was conducted between 11 September and 6 December 1979. Seventeen flights were required for a total of 41.4 hours, of which 32.8 hours were productive. Testing was conducted at the Boeing Flight Test Facility at Wilmington, Delaware. The YCH-47D exhibits improved lift capability at a hover (both in and out of ground effect) when compared to the CH-47C with fiberglass rotor blades ... |
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| Artificial Icing Test CH-47C Helicopter with Fiberglass Rotor Blades. |
JUL 1979 |
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| Authors:
John R. Niemann; Frame J. Bowers III; Sherwood C. Spring; ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA
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| The United States Army Aviation Engineering Flight Activity in conjunction with the Boeing Vertol Company conducted an evaluation of the CH-47C helicopter with fiberglass rotor blades and a prototype blade de-ice system. The rotor blades were tested under natural and artificial icing conditions at St. Paul, Minnesota from 24 January to 2 March 1979, and required 30.1 flight hours of which 17.7 hours were in an icing environment. Testing was ... |
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| Preliminary Airworthiness Evaluation RU-21H Guardrail V Aircraft. |
MAR 1978 |
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| Authors:
John R. Niemann; Raymond B. Smith; William A. Norton; Frederick S. Doten; ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CALIF
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| The RU-21H (GR V) exhibited 1 deficiency and 10 shortcomings which will degrade its overall capability. The single-engine minimum-control airspeeds (V sub MC) were 5 to 10 knots greater than the data provided in the operator's manual. The incorrect V sub MC data presented in the operator's manual are a deficiency which warrants further testing and, as an interim measure, requires that a WARNING be incorporated in the operator's manual. ... |
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| Airworthiness and Flight Characteristics Evaluation Improved Main Rotor Blade Installed on a YAH-1R Helicopter. |
NOV 1977 |
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| Authors:
George M. Yamakawa; John R. Niemann; Raymond B. Smith; Ralph Woratschek; James E. Jenks Jr; ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CALIF
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| The United States Army Aviation Engineering Flight Activity conducted an airworthiness and flight characteristics evaluation of the Kaman Aerospace Corporation improved main rotor blade (K-747) installed on a YAH-1R helicopter. The Bell Helicopter Textron YAH-1R was tested from 25 February through 10 June 1977 at three sites in California: Edwards Air Force Base (2302-foot evaluation), Bishop (4120-foot elevation), and Coyote Flats (9980-foot elevation). A total of 82.9 test flight hours ... |
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