I would like to know how hot a muffler gets while running the engine.

My Rossi has a minipipe muffler and I just don't trust the coilspring around the cylinder retention method. So, I took a piece of pushrod and made a small eyelet. I glued that into the fusalage. Then I took a nylon zip-tie and strapped the muffler down. Now I am wondering if the zip-tie will melt. Should I replace it with a radiator hose clamp? What do you think?

Tom

I guess I will have to find out the hard way. I did some experimenting on some extra zip-ties. I wrapped one around my covering iron. Then I slowly raised the temp every few minutes. The tie held up fine all the way up to 400 degrees. At 400 the zip-tie started to stretch a little. When cooled off the tie shrunk back to normal. I think she's gonna hold.

I ran those wrap-around springs on my cars and they go through a lot more stresses than planes do and I have never had or seen one come off. You can always double up.