{"id":485824,"date":"2024-11-05T12:11:59","date_gmt":"2024-11-05T12:11:59","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/agma-05ftm16\/"},"modified":"2024-11-05T12:11:59","modified_gmt":"2024-11-05T12:11:59","slug":"agma-05ftm16","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/agma\/agma-05ftm16\/","title":{"rendered":"AGMA 05FTM16"},"content":{"rendered":"<p>Authors: Joseph P. Petrella, James S. Kachelries and Scott M. Holder, The Boeing Company<\/p>\n<p>and Thomas E. Neupert, U.S. Army<\/p>\n<p>This paper summarizes an Engine Transmission Input Pinion Seeded Fault Test that was accomplished as a<\/p>\n<p>portion of the validation process for the Boeing Rotorcraft Transmission Vibration Diagnostic System (TVDS)<\/p>\n<p>Analyzer. The test specimen was a high speed CH47D (Chinook) engine transmission input pinion with a<\/p>\n<p>known defect (i.e., seeded fault) machined into a high stress area of a gear tooth root. The specimen was<\/p>\n<p>operated at &#034;overload&#034; conditions in order to initiate and propagate a fatigue crack from the seeded fault.<\/p>\n<p>During the testing, the TVDS analyzer monitored the test pinion real time and successfully provided a<\/p>\n<p>sufficient warning time of the impending failure. (Note: No metallic chips were generated during the test).<\/p>\n<p>Following testing, the TVDS data (acquired real time) was evaluated along with a post&#8211;test fractographic<\/p>\n<p>evaluation of the fatigue crack. During the post&#8211;test fractographic evaluation, arrest lines and fatigue<\/p>\n<p>striations were analyzed to develop crack propagation data as a function of thenumber of applied load cycles.<\/p>\n<p>This data was then correlated with the collected TVDS data to better understand the potential warning signals<\/p>\n<p>the TVDS system could provide about the impending failure of a helicopter&#039;s primary drive system<\/p>\n<p>components. In this test, the TVDS analyzer provided a minimum of eleven minutes warning time (at higher<\/p>\n<p>than normal operation loads) of the impending failure, which would allow the pilot enough time to unload the<\/p>\n<p>suspect engine transmission and continue to fly on the remaining engine.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>CH47D Engine Transmission Input Pinion Seeded Fault Test<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/agma\/\"><b>AGMA<\/b><\/a><\/td>\n<td>2005<\/td>\n<td>13<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":485833,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2659],"product_tag":[],"class_list":{"0":"post-485824","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-agma","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/485824","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/485833"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=485824"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=485824"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=485824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}