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Thinking about load testing one main gear assembly off the plane project
anticipated for 1000 # gross and have two question areas. FIRST: FAR 23.725 provides a drop height range from 9.2 " to 18.7". With a 1000# gross plane, I think this calculates as 797 and 882# respectively on each main..........Correct?? IE: I was going to apply 797# minus the actual gear weight at 9.2" height. Ground Load Dynamic tests in 23.726(a)(1) also requires a test at 2.25 x height in above 23.725. This raises the drop heights to 20.7" and 42" with weights at 892# and 942# if calc'ed correctly. In a previous project a long while ago, I merely used a 3G load divided by mains to size the structural members. Then with the aforementioned 1000# gross, it would have be 1500# on each gear. My rational for the 3G was 23.561(b)(2) for emergency landing upward conditions on a normal category airplane structure. SECOND: What setup could be used to do such a load test?? Is it mandatory to actual freefall drop or somehow just apply the load?? Maybe along the lines of a built up 2x4 beam lever approach.......Any suggestions?? Am I thoroughly confused G? Thanks, Dick ps Although RAH has been very helpful in the past, if there is a better website for this kind of discussion, I would appreciate knowing it. |
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