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Hi Allen,
Yes, the temps get up there a bit. Stainless steel
is pretty much the standard although heavy gauge mile steel can work - but
generally too heavy for an aircraft. I think the two mufflers already
mentioned the FlowMaster Hushpower II and the SpinTech are two that have flown
and survived. I do not now of any specs for an exhaust system, it
would depend a lot on the type of installation involved.
Ed
----- Original Message -----
Sent: Wednesday, February 21, 2007 9:48
PM
Subject: [FlyRotary] Re: Another
exploding cigar??
Ed,
I'm a newby to the rotary, but I understand that the temps are pretty
outrageous also. Somethink like 1700 to 1900 degrees F. Does
anyone have a spec or detail for exhaust systems? Mufflers would be nice
also.
Allen Slominski
Hi Dave.
Basically, the Swiss muffler is attributed to the
tough noise abatement rules of the Swiss government for aircraft
- including small GA and experimental. Tony Bingelis who wrote a
column of "How to" for Sport Aviation for years included it in one of his
books "FireWall Forward"-Page 112.
The muffler (as shown in his book) was an aluminum
tube 3 1/8" in diameter about 4 -5 feet long. A stainless steel mesh
was rolled into a smaller diameter tube to be stuck in the
middle after fiberglass cloth was wrapped around
the mesh tube. This was all stuffed in the 3 1/8" aluminum tube
making a very light weight and effective muffler. Sort of a
light weight glass-pack muffler.
It was then hung under the belly of the
aircraft.
The problem for the rotary is that the exhaust pulse
will pulverize fiberglass (or almost anything else in short
time). Again, the problem is not the heat its the power of the exhaust
pulse.
Hope that explained it.
Ed
----- Original Message -----
Sent: Wednesday, February 21, 2007
6:44 PM
Subject: [FlyRotary] Re: Another
exploding cigar??
On 22, Feb , at 6:29 AM, Ed Anderson wrote:
Thanks, Jason.
My experiments with the Swiss muffler did
not work out -
Ed
Hi
Ed,
could you explain "Swiss" muffler?
TIA,
Dave
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