Engineering Test of UH-1D Helicopter with XT67 Power Plant Installed
Abstract
This report presents the results of limited engineering tests conducted to determine the performance characteristics of the XT67 power plant (i.e. two T72 engines) installed in a YUH-1D/48-foot rotor helicopter. Ten productive hours were flown. The XT67 power plant improved the hover and climb performance of the UH-1D/48-foot rotor helicopter by sustaining the helicopter main transmission torque limit to higher altitudes than were possible with the T53-L-11 engine. The XT67 power plant improved the level flight performance by allowing higher cruise speeds for essentially the same range. Increased range could be attained by shutting down one engine. Test installation losses were high but could be reduced significantly through continued development. The static droop characteristics of the XT67 power plant were acceptable. Static load sharing was excellent; however, load sharing during power transient, although adequate, could be improved. The transient response of the power plant- dynamic system was slow. This shortcoming should be corrected prior to service test.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0845032
Entities
People
- John R. Melton
- William A. Anderson
Organizations
- Edwards Air Force Base