Buly,

It's a BD4, tractor.

Allen

Bulent Aliev <atlasyts@bellsouth.net> wrote:
Allen,
The plane you are building will make difference in your exhaust
options. Tractor or pusher?
Bulent "Buly" Aliev
FXE Ft lauderdale, FL
http://tinyurl.com/dcy36

On Feb 21, 2007, at 9:48 PM, Allen Slominski wrote:

> 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
> Houston, TX
>
> Ed Anderson wrote:
> 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 -----
> From: david mccandless
> To: Rotary motors in aircraft
> 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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