OK, you guys know me. I just go to the source so I KNOW what I'm talking about instead of guessing. I just called the Gorilla Glue folks at the phone number on the bottle. Tensile strength on Douglas Fir is 1700 psi. T-88 is 7000 psi (although it's not given as to what kind of wood was tested). Spruce has a tensile strength of something like 10,000 psi parallel to the grain and 130 perpendicular to the grain, and there are other factors involved as well, but you might could argue for most applications that either would do. But T-88 is stronger than Gorilla Glue, and I personally would use T-88.
One other deciding factor might be shelf life. The bottle of GG that I picked up is less than a year old and has only been opened once, and very little was used, but it's solid as a rock. T-88 lasts for years with no perceptible change. I've never seen it go bad. For airplane use, I would simply use the best. I was going to do some comparitive tests on spruce, but I'm not going to waste the money on a bottle just so I use a few grams and then have to throw the rest of the bottle away next year. Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net --------------------------------------------------------------
