Attack Helicopter High-Altitude Evaluation, Blackhawk S-67 Helicopter

The US Army Aviation Systems Test Activity conducted a limited evaluation of the performance and handling qualities of the Sikorsky S-67 Blackhawk helicopter at a high-altitude test site during the period 8 to 13 July 1972. This evaluation, which required five hours of productive flight time, was performed at Alamosa, Co, at density altitudes of 7830 to 10,790 feet. Except as specifically noted in this report, the performance and handling qualities at high altitude were essentially unchanged from those reported during the previous low-altitude testing.