Paul, here are few pictures from my new muffler construction. The
flange has two stubs with slip joints 0.065 SS that are pulled
together with strong springs (not shown). The perforated tube is
welded only on one side to the can. The other side fits into a slip
socket welded to the lid, so it is allowed to float. Sofar works
very well , but I need more time to see how it will hold?
Bulent.
I assume that is 321 SS. Nice workmanship.
I hate to be the bearer of bad news but the perforated tube
will run white hot, melt and eventually puke it self out of the
can and out the through the prop. Tom Jordon had something like that
on a Limo EZ. One could stand behind the prop with the engine
at full chat and look down the exhaust pipe. It was like
looking at a very bright light bulb in there :)
Try to get some sort of air cooling tube down the center.
I'll send some 3D's shortly.
Also put some sort of safety strap on the whole muffler
so if worse comes to worse the whole muffler won't go through
the prop taking out a blade.
Paul Lamar ...No rotor no motor.
-----------------------
I was involved in the Exhaust industry for a number of years including
designing the odd muffler.
What Paul says is true, however the one thing not mentioned is just how
bad this style of design is
it will allow exhaust gas flow that's about it, this is what is
nicknamed a "back pressure" it is
unbelievably bad in gas flow which = HP which means increased fuel
consumption by quite a bit,
My suggestion is do not use this style design at all. It is one of the
worst designs there is.
It will shut things up but , it will run a lot hotter, create excessive
back pressure, increase fuel
consumption & reduce horsepower just to name a few things all of which
you really do not want!
Sorry. I just had to stress this.
Try another style. While not the best option it will work somewhat
better if you use the can with out the tube
in the middle try to improve the tube curve into it, and use the pipe
out it bigger the better within limits in the
same place, while not the most efficient it is better than with the
perforated tube in the middle it will also last a while
and yes use at least 2 or more support straps to stabilise it and to
ensure if it breaks it stays right there you
will hear it if it breaks.
Regards David
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