Oli

I agree with the comments made especially Jack Diaz. I bought an old part built plane a while ago and the Robart hinge pins had been gluued with epoxy that had completely denatured over the years and I could pull them all out without much force. Thankfully our planes rarely last this long!

When we were flying last week one of our group had a jet that he bought fairly new second hand and the aileron servo just dropped out on landing! On inspection the servo hardwood blocks were glued to some 'Chinese' ply. The glue bond had not failed but with very little force the ply had delaminated. When you have finished you tests and selected the 'best' adhesive it will be interesting if you could use it on different commonly used mounting materials. I am certain that the Chinese ply faced plates will delaminate before the servo would fail and would surprise some. The better airframes like the JL Viperjet use a moulded plastic plate so gluing is not required at all. Your tests while good for comparison are not what we normally see in our airframes.

John