GTU-37B B77 Timer Support Dynamic Load Test, Test No. 7545

摘要

Data are presented for three drop tests of a magnesium timer support K94499B. The first, conducted on April 11, 1977, did not include components mounted in the timer support. Two drop tests on May 13, 1977, used the same magnesium timer support and included active electrical components: a thermal battery, a timer simulator, and a midcase junction box, in addition to a mock thermal battery and a structural timer mounted within the timer support. The principal conclusion was that the timer support was not structurally adequate to survive bomb impact loads. These drop tests resulted in a redesign of the timer support, with increased stiffness obtained through the use of thicker webs and stiffening ribs. The material was changed from magnesium to 6061-T651 aluminum. (ERA citation 03:041425)