Jarrett

When I did my first test Hysol batches to get a feel for what it was like to
work with, I encountered similar symptoms. I was able to determine that in
my case, it was due to mixing problems. With Hysol being as thick as it is,
it is very easy to have it be short of adequately mixed. I changed my mixing
method based on a tip I got from Jim Nordin. I put the measured Part A and
Part B on a white plastic board (mine is made of polyethylene, I got it from
the scrap bin at a local plastics shop). Using a Bondo style plastic
spreader, I alternate between spreading the two out, and then scraping them
together into a small "glob". I just keep repeating this until the color
throughout all of the material is a completely consistent color (sort of a
bluish grey). It takes several iterations of spreading and collecting to get
it completely mixed. You should see no color streaks at all in the material
when you spread it out and it is fully mixed. This is much harder to judge
when you mix it in a container. Since I started using this technique, every
Hysol batch I have mixed has cured perfectly.

Given what you are saying about your scales, and assuming you are measuring
out the correct ratios, mixing would be at the top of my suspect list.

As far as what you should do with the work already done on your parts, I
would discuss it with Lancair. Post cure procedures can help minimize many
cure problems, but there are limits to what that can fix. I am not sure
which side of the limit your parts are on.

Don Parsons
ES-166-FB