SERVICE TEST OF THE YAC-1DH AIRPLANE
ARMY ARCTIC TEST CENTER FORT GREELY ALASKA
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Tests were conducted to 1 determine the suitability of the YAC-1DH Carbon airplane for Army use under arctic winter conditions 2 determine whether it has any deficiencies or shortcomings which should be corrected in the production models and 3 determine the suitability of the T62-T-7 turbine auxiliary power unit APU as installed in the YAC-1DH. The YAC-1DH Caribou test airplane is a twin-engine, high-wing, utility transport-type airplane. Results indicate that the test airplane was satisfactory with respect to operating characteristics, flight and performance characteristics, tactical suitability, and maintenance at the temperatures encountered 32F through -35F. The T62-T-7 turbine was satisfactory as an APU and engine preheat unit. It was recommended that the YAC-1DH airplane be considered suitable for Army use after correction of the deficiencies and shortcomings which are noted.