This is Dangerous!
A couple of months ago I finished a 80" Spacewalker with a YS91FZ engine.
Built a stand for it out of 1/2" PVC and placed the new bird in the stand for initial tests. Tied the tail of the plane to my truck tire and looked the whole thing over real close.
....Tied off...stand secure....prop tight....spinner tight...let's crank her up!
Started just fine, idled just fine, top end just fi......
...What's happening??? The PVC stand is coming apart! Oh, God! I forgot to glue it! The whole 2-second disaster seemed to be in slow motion.......
Well, at about 9,000rpm that stand failed and the bird dropped about two feet to the ground. Thank heaven I had tied the tail to the truck. Well, the prop hit (Zinger) and flew into a million pieces. My dog was next to me and I've never seen an animal run so fast. Won't come anywhere near my planes anymore, she just shakes her head and mumbles something like "you idiot".
No real harm done, but it could have been real bad.
Needless to say, now I not only glue my stands, but duct-tape them, too! LOL