RE: Bond strength: 15 vs 30 minute epoxy...
Hi!
You are right SST!
Who cares what you use to bond together two winghalves when all glue available to us hobbyists is stronger than the wood we use (balsa , plywood and foam).
After 30 years in this hobby I prefere "Flash" Ca glue for most of my building and of course accelerator.
I never use a single heavy glassfiber peice on my wings, instead I use 25g weave put on in several layers, cut into a diamond shape with 4-5 layers, doing one side of the wing at a time.
And I do recommend not to use anything other than polyester resin or 24 hour epoxy for reinforsing the wing center. These materials are very easy to sand and wet the glassfiber much better than ordinary "glue" epoxy.
Regards!
Jan K
Sweden