Being in the military aviation, USCG, I get to see a lot of good info on the real thing. I have been studying for my servicewide, for those who dont know its a test you take to move up in rank. These tests actually ask some pretty far out there questions, (about stuff that you hardly ever see on a day to day basis). Anyways, I came across some good gouge about composite materials. The number 1 cause of delamanitaion in composite aircraft is vibration from turbine engines. They cause very high frequency vibes. Anyone ever try testing this theory out on the turbines we use? I know it may not be a big deal because how many jets have you seen that are falling apart from delamanation? None the less have you been doing thorough post flight inspections of your a/c looking for this? I know I havent. I will be in the garage tonight looking close!!!! Just food for thought....