<<The foam I use today is exclusively Foamular 250 and Foamular 600. I agree that it makes no sense to use Foamular 150 or the equivalent blue foam (Dow score board) if Foamular 250 or Dow square edge are available. There is almost no difference in weight but a noticeable difference in strength.
In all of my high-vacuum bagging experience I have never seen a "foam worm". So for me, the mystery remains.>> Again, I really appreciate the feedback and experience shared. I'll also admit that, based on the comments of a number of folks, the idea of too much vacuum is not very satisfying. I'll still leave the door open to the possibility that it may be something I'm doing in handling the cores either pre or post bagging. However, I've talked with some folks who discount that as well. So perhaps this is something specific to 150 and/or the lots I've been using. Maybe they just don't send the good stuff to Oklahoma? Over the next week or so I'll be checking Foamular 150 (Owens product) vs Dow 250 with vacuum as a variable. The 'Mighty Mini' checks out at 8 in. The ACS pump system has a decent reservoir and pulls down to at least 25 in. In checking my archives from ~ 3 years back, Foamular 250 did not exhibit this problem. I've done about 30 wings in that time and it's only recently this issue came up. As near as I can tell, it just happens with light layups with 150. Sure wish the local supplier hadn't stopped carrying 250. We'll keep looking and will post results. - Dave R RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
