A testing situation is described in which the test specification was derived from MIL-STD-810D for helicopter flight vibration of some test items. The items were to be inside two very large transportation containers -- masses on the order of 2000 to 4000 pounds. Severe testing difficulties were anticipated in achieving the desired levels from the test specification. It was then decided to obtain appropriate field data to modify the test specification. The data were obtained during flights of CH-47D helicopters containing the transportation containers. The vibration levels experienced by the test items were significantly below those specified in the original test plan.
Helicopter flight vibration of large transportation containers: A case for testing tailoring
1989
7 pages
Report
No indication
English
Air Transportation , Aeronautics , Structural Mechanics , Helicopters , Containers , Flight Testing , Mechanical Vibrations , Acceleration , Aerodynamics , Comparative Evaluations , Data Analysis , Data Processing , Experimental Data , Flexibility , Fourier Analysis , Frequency Analysis , Gears , Performance Testing , Specifications , Temperature Effects , Weight , Meetings , Tables(data) , EDB/320201 , EDB/420500 , EDB/420200
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