These tests were conducted to establish a moderate icing flight envelope for the helicopter with the AN/ALQ-151(V)2 countermeasures system installed. A total of 12.3 hours were flown in the icing environment. After damage to an unprotected direction finding (DF) dipole antenna during an icing encounter, the original DF dipole antennas were removed and a prototype thermoelectrically anti-iced DF dipole antenna was installed in position no. 3 (aft right side). During ...
A limited artificial and natural icing evaluation of the production UH-60A Black Hawk helicopter equipped with an External Stores Support System (ESSS) and selected components of a prototype Wire Strike Protection System (WSPS) was conducted to determine the capability to operate safely in a moderate icing environment. Testing was performed by the United States Army Aviation Engineering Flight Activity and consisted of 23.6 productive flight hours. The UH-60A helicopter configured ...
This preliminary airworthiness evaluation was conducted on an OH-58C helicopter configured with a 3-axis digital stability control augmentation system (SCAS) and an improved tail rotor. Additional testing on the standard OH- 58C equipped with the 3-axis SCAS was required in response to questions which surfaced during working sessions of the Joint Special Study Group investigating 0H-58 loss of tail rotor effectiveness. Testing was accomplished at Arlington, TX (elevation 630 feet), ...
The United States Army Aviation Engineering Flight Activity supported a contractor engineering effort to correct the nose-down pitch-over during takeoff and the large, variable position error in the low-speed flight regime of the UH-60A (Black Hawk) helicopter. A Preliminary Airworthiness Evaluation was then conducted with the improved airspeed and stabilator systems in their final configuration as defined by the contractor. Handling qualities and airspeed system characteristics were evaluated for two ...
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