Limited Performance Tests CH-54B (Tarhe) Helicopter
Abstract
The United States Army Aviation Systems Test Activity conducted a limited performance evaluation and airspeed envelope expansion of the Sikorsky CH-54B (Tarhe) helicopter. Hover performance, level flight performance, airspeed calibration, and envelope expansion testing were conducted without the engine air particle separator installed. Testing required 13.6 productive flight hours. At takeoff power, the standard-day out-of-ground-effect and in-ground-effect (10-foot) hover ceilings were 6600 and 9050 feet, respectively, at maximum gross weight (47,000 pounds). The hover ceiling on a 35C day, in ground effect, was 4900 feet at maximum gross weight. Level flight performance was obtained over a gross weight range of 26,070 to 29,990 pounds and a density altitude range of 5580 to 11,580 feet. The airspeed for best endurance was nominally 65 knots true airspeed and the never-exceed airspeed (101 knots calibrated airspeed) was the long-range cruise speed. A 33-percent increase in specific range could be achieved by operating with one engine after reaching cruise altitude. Airspeeds up to 125 knots calibrated airspeed were flown during the level flight, unaccelerated airspeed envelope expansion with no undesirable aircraft characteristics. No deficiencies or shortcomings were observed. The winch load indication system installed in the CH-54B enhanced sling load operations and should be installed in all cargo helicopters with a sling load capability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1973
- Accession Number
- AD0910263
Entities
People
- James S. Reid
- Jerome M. Johnson
- John N. Johnson
- Robert K. Merrill
- Vernon L. Diekmann
Organizations
- Edwards Air Force Base