Building a gen-turi style exhaust stack

D.E.Bishop wrote:
No need to apologize Ohhwell, we all know how it gets at times. I noticed something in the picture Dutch posted, the straps between the ell and the pipe are riveted in place. I have a lot of pop-rivets in different sizes and thought about using them instead of the carriage bolts and nuts. I didn't because I thought it would be very difficult to slip the backing washers over the rivet inside the pipe and the shaft of a pop-rivet isn't very big when expanded and I thought it might become loose due to the softness of the pipe. Does Camco use washers on the inside?

When I was working I had access to our metal shop and could have used peened rivets and a couple of other types of fasteners. I was trying to make the inside wall free of anything that would cause turbulence and still look good. I chose carriage bolts because there was no need to hold the bolt while tightening. The square shoulder just bites into the plastic pipe and remains stationary, which is what it is designed to do.

I am going to go to the muffler shop again and have them take a piece of tubing the same size as the ell and reduce one end so I can put it in the ell and extend it up inside the pipe about three inches, just to see if it will reduce the generator noise significantly. It would be nice to reduce the noise inside the MoHo if possible. I'll report back on that in about a week or two after I get a chance to test it out.

This is getting to be fun like I said in my OP, I'm a frustrated German craftsman(like my Dad, Grand Dad and Great Grand Dad were) and finding some other ways of building this thing are fun for me.