swiss muffler

[Harold Dick]

Has anyone tried or heard of anyone experimenting with the Swiss style
muffler system on an engine as large as an O-320?
Harold Dick
633E



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[later]

I've been looking at it with interest. Main concern was how to insure that it
stays on. Don't know anyone that's done it. later

On 5/27/2003 1:30 PM, HDICK@IAW.ON.CA wrote to MURPHY-REBEL:

-> From <hdick@iaw.on.ca> Thu, 22 May 2003 11:57:25 -0800 remote from
dcsol.com
-> Received: by dcsol.com (Wildcat! SMTP Router v5.6.450.61)
-> for murphy-rebel@dcsol.com; Thu, 22 May 2003 11:57:25 -0800
-> Received: from canal.iaw.on.ca ([209.5.112.33]) EHLO=canal.iaw.on.ca
-> by dcsol.com (Wildcat! SMTP v5.6.450.61) with SMTP
-> id 1370750671; Thu, 22 May 2003 11:57:24 -0800
-> Received: from as4-13.iaw.on.ca ([209.5.117.152] helo=hdick)
-> by canal.iaw.on.ca with smtp (Exim 4.05)
-> id 19IwBj-0003wP-00
-> for murphy-rebel@dcsol.com; Thu, 22 May 2003 15:57:20 -0400
-> Message-ID: <001001c3209c$a99afe40$987505d1@hdick>
-> From: "Harold Dick" <hdick@iaw.on.ca>
-> To: <murphy-rebel@dcsol.com>
-> Subject: swiss muffler
-> Date: Thu, 22 May 2003 15:59:30 -0400
-> X-Orig-MIME-Version: 1.0
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=_NextPart_000_000D_01C3207B.2162DFA0"
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->
-> Has anyone tried or heard of anyone experimenting with the Swiss style
-> muffler system on an engine as large as an O-320?
-> Harold Dick
-> 633E
->




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[klehman]

Mounting should not be difficult. For a Rebel one can run 2"+ bolt(s)
down through the cage for a forward mount.

For the rear mount the Rebel has the double bunkhead at the conventional
gear drag strut mounting points. Inside the cabin one could lay a 3"
long aluminum strap (0.187 x 1" bar?) or angle across the double
bulkhead and then insert a long bolt down through the strap and out the
fuselage bottom. I'd suggest two bolts a couple of inches apart
sideways. I looked at incorporating hardpoints there before I closed but
decided to do it that way.

Ken

later@dcsol.com wrote:

I've been looking at it with interest. Main concern was how to insure that it
stays on. Don't know anyone that's done it. later

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[paco]

Hope this can help.
I started flying with gliders, so for me, quieter is better!

I have installed a 36" swiss muffler on 0145R and is working well so far!
Very quiet on the ground and in flight. Just one word of warning, the swiss
muffler can be made with an aluminum outer shell that is seamed together. If
the engine you are using has large exhaust pulses, and the muffler attached to
solid to the exhaust, it can split the seam open.
I gained 150RPM static when I switched from a single SuperTrapp to the
Swiss so I guess the EA-81 was asking for a bit more back pressure. I didn't
drop bolts through the floor, I installed a 4"x6" 1/8" thick aluminum plate to
the underside of the aircraft and used 2 timing belt rubber straps for
vibration damping at rear. On the front I installed a rather expensive
stainless braided flex coupling from the local autoparts store. You have to
ensure that the engine exhaust and Swiss muffler have plenty of flex between
them or it will rip the Swiss Muffler to bits. I can send pic's if you are
interested.

Frank



On 5/28/2003 5:13 AM, LATER wrote to HDICK@IAW.ON.CA:

-> I've been looking at it with interest. Main concern was how to insure that
it
-> stays on. Don't know anyone that's done it. later
->
-> On 5/27/2003 1:30 PM, HDICK@IAW.ON.CA wrote to MURPHY-REBEL:
->
-> -> From <hdick@iaw.on.ca> Thu, 22 May 2003 11:57:25 -0800 remote from
-> dcsol.com
-> -> Received: by dcsol.com (Wildcat! SMTP Router v5.6.450.61)
-> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 11:57:25 -0800
-> -> Received: from canal.iaw.on.ca ([209.5.112.33]) EHLO=canal.iaw.on.ca
-> -> by dcsol.com (Wildcat! SMTP v5.6.450.61) with SMTP
-> -> id 1370750671; Thu, 22 May 2003 11:57:24 -0800
-> -> Received: from as4-13.iaw.on.ca ([209.5.117.152] helo=hdick)
-> -> by canal.iaw.on.ca with smtp (Exim 4.05)
-> -> id 19IwBj-0003wP-00
-> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 15:57:20 -0400
-> -> Message-ID: <001001c3209c$a99afe40$987505d1@hdick>
-> -> From: "Harold Dick" <hdick@iaw.on.ca>
-> -> To: <murphy-rebel@dcsol.com>
-> -> Subject: swiss muffler
-> -> Date: Thu, 22 May 2003 15:59:30 -0400
-> -> X-Orig-MIME-Version: 1.0
-> -> X-Orig-Content-Type: multipart/alternative; boundary="----
-> =_NextPart_000_000D_01C3207B.2162DFA0"
-> -> X-Priority: 3
-> -> X-MSMail-Priority: Normal
-> -> X-Mailer: Microsoft Outlook Express 5.00.2615.200
-> -> X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
-> ->
-> -> Has anyone tried or heard of anyone experimenting with the Swiss style
-> -> muffler system on an engine as large as an O-320?
-> -> Harold Dick
-> -> 633E
-> ->
->
->




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[paco]

You are very right,
The Swiss Muffler is nothing more than a light-weight "Cherry Bomb" I have
two of these installed on my dune buggy and they cut down the noise about the
same. I never realized how much noise those Facett fuel pumps make till I flew
with the Swiss Muffler. With both of them on, they drive you nuts! Mostly prop
noise now and at 1600 rpm, that's not a significant amount of noise either!
I think the real important thing here is the use of a flexible exhaust
coupling.

If it would stop raining in Southern Ontario I could do some flying, at which
time I will take a couple of Muffler pic's and send them in.

Frank



On 5/29/2003 7:16 AM, DREWJAN@CABLETV.ON.CA wrote to MURPHY-REBEL:

-> From <drewjan@cabletv.on.ca> Thu, 29 May 2003 06:37:24 -0800 remote from
dcsol.com
-> Received: by dcsol.com (Wildcat! SMTP Router v5.6.450.61)
-> for murphy-rebel@dcsol.com; Thu, 29 May 2003 06:37:24 -0800
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-> by dcsol.com (Wildcat! SMTP v5.6.450.61) with SMTP
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-> id 75DA326656; Thu, 29 May 2003 10:37:22 -0400 (EDT)
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[66.203.170.107])
-> by ns1.cabletv.on.ca (Postfix) with SMTP id 727E626950
-> for <murphy-rebel@dcsol.com>; Thu, 29 May 2003 10:37:21 -0400 (EDT)
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-> X-Sender: drewjan@mail.cabletv.on.ca
-> X-Mailer: Windows Eudora Light Version 3.0.1 (32)
-> Date: Thu, 29 May 2003 10:42:09 -0400
-> To: <murphy-rebel@dcsol.com>
-> From: Drew Dalgleish <drewjan@cabletv.on.ca>
-> Subject: Re: swiss muffler
-> In-Reply-To: <00e901c325dd$b473e480$5c0cfea9@hdick>
-> References: <1054128528@dcsol.com>
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->
-> At 08:27 AM 5/29/2003 -0400, you wrote:
-> >Thanks for the feed back. Pictures would be appreciated. Has the design of
-> >these mufflers been given any formal engineering yet or are people still
-> >experimenting? I assume that there is nothing commercially available.
-> >Harold Dick
-> >633E
-> >
-> I've never seen a swiss muffler but there's a very good description in Tony
-> Bingelis' book firewall forward. From the construction he describes it's
-> just a very long glass pack muffler. They've been around for a long time
-> but I doubt that there's ever been any real engineering. If you want
-> something comercial you could go to your local speed shop and experimental
-> airplane parts store. Order a couple cherry bombs and mount them end to
-> end. ;-))
-> Drew Dalgleish
->
->




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[Harold Dick]

Thanks for the feed back. Pictures would be appreciated. Has the design of
these mufflers been given any formal engineering yet or are people still
experimenting? I assume that there is nothing commercially available.
Harold Dick
633E



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[Drew Dalgleish]

At 08:27 AM 5/29/2003 -0400, you wrote:

Thanks for the feed back. Pictures would be appreciated. Has the design of
these mufflers been given any formal engineering yet or are people still
experimenting? I assume that there is nothing commercially available.
Harold Dick
633E

I've never seen a swiss muffler but there's a very good description in Tony
Bingelis' book firewall forward. From the construction he describes it's
just a very long glass pack muffler. They've been around for a long time
but I doubt that there's ever been any real engineering. If you want
something comercial you could go to your local speed shop and experimental
airplane parts store. Order a couple cherry bombs and mount them end to
end. ;-))
Drew Dalgleish




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[Joel Jacobs]

Here is a page about the Swiss muffler:
http://thunder.prohosting.com/~gnip/flight/muffler.html
Joel




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[later]

Hello PACO and THANKS for the input. Is 36" enough? Which engine are you
running? Pictures would be great!
Thanks again, LATER

On 5/29/2003 5:26 PM, PACO wrote to LATER:

-> Hope this can help.
-> I started flying with gliders, so for me, quieter is better!
->
-> I have installed a 36" swiss muffler on 0145R and is working well so
far!
-> Very quiet on the ground and in flight. Just one word of warning, the swiss
-> muffler can be made with an aluminum outer shell that is seamed together.
If
-> the engine you are using has large exhaust pulses, and the muffler attached
to
-> solid to the exhaust, it can split the seam open.
-> I gained 150RPM static when I switched from a single SuperTrapp to the
-> Swiss so I guess the EA-81 was asking for a bit more back pressure. I
didn't
-> drop bolts through the floor, I installed a 4"x6" 1/8" thick aluminum plate
to
-> the underside of the aircraft and used 2 timing belt rubber straps for
-> vibration damping at rear. On the front I installed a rather expensive
-> stainless braided flex coupling from the local autoparts store. You have to
-> ensure that the engine exhaust and Swiss muffler have plenty of flex
between
-> them or it will rip the Swiss Muffler to bits. I can send pic's if you are
-> interested.
->
-> Frank
->
->
->
-> On 5/28/2003 5:13 AM, LATER wrote to HDICK@IAW.ON.CA:
->
-> -> I've been looking at it with interest. Main concern was how to insure
that
-> it
-> -> stays on. Don't know anyone that's done it. later
-> ->
-> -> On 5/27/2003 1:30 PM, HDICK@IAW.ON.CA wrote to MURPHY-REBEL:
-> ->
-> -> -> From <hdick@iaw.on.ca> Thu, 22 May 2003 11:57:25 -0800 remote from
-> -> dcsol.com
-> -> -> Received: by dcsol.com (Wildcat! SMTP Router v5.6.450.61)
-> -> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 11:57:25 -0800
-> -> -> Received: from canal.iaw.on.ca ([209.5.112.33]) EHLO=canal.iaw.on.ca
-> -> -> by dcsol.com (Wildcat! SMTP v5.6.450.61) with SMTP
-> -> -> id 1370750671; Thu, 22 May 2003 11:57:24 -0800
-> -> -> Received: from as4-13.iaw.on.ca ([209.5.117.152] helo=hdick)
-> -> -> by canal.iaw.on.ca with smtp (Exim 4.05)
-> -> -> id 19IwBj-0003wP-00
-> -> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 15:57:20 -0400
-> -> -> Message-ID: <001001c3209c$a99afe40$987505d1@hdick>
-> -> -> From: "Harold Dick" <hdick@iaw.on.ca>
-> -> -> To: <murphy-rebel@dcsol.com>
-> -> -> Subject: swiss muffler
-> -> -> Date: Thu, 22 May 2003 15:59:30 -0400
-> -> -> X-Orig-MIME-Version: 1.0
-> -> -> X-Orig-Content-Type: multipart/alternative; boundary="----
-> -> =_NextPart_000_000D_01C3207B.2162DFA0"
-> -> -> X-Priority: 3
-> -> -> X-MSMail-Priority: Normal
-> -> -> X-Mailer: Microsoft Outlook Express 5.00.2615.200
-> -> -> X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
-> -> ->
-> -> -> Has anyone tried or heard of anyone experimenting with the Swiss
style
-> -> -> muffler system on an engine as large as an O-320?
-> -> -> Harold Dick
-> -> -> 633E
-> -> ->
-> ->
-> ->
->
->




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[Rick Harper]

G'day Frank !

I'm just about to make & fit a 4 into 1 exhaust system for our IO -
320 in Rebel 541R .... could you please send me the photos of the Swiss
muffler.

Thanks

Rick & Wendy Harper
rjwh@ozemail.com.au
----- Original Message -----
From: paco@dcsol.com
To: murphy-rebel@dcsol.com
Sent: Wednesday, May 28, 2003 11:28 PM
Subject: RE: swiss muffler


Hope this can help.
I started flying with gliders, so for me, quieter is better!

I have installed a 36" swiss muffler on 0145R and is working well
so far!
Very quiet on the ground and in flight. Just one word of warning, the
swiss
muffler can be made with an aluminum outer shell that is seamed
together. If
the engine you are using has large exhaust pulses, and the muffler
attached to
solid to the exhaust, it can split the seam open.
I gained 150RPM static when I switched from a single SuperTrapp to
the
Swiss so I guess the EA-81 was asking for a bit more back pressure. I
didn't
drop bolts through the floor, I installed a 4"x6" 1/8" thick aluminum
plate to
the underside of the aircraft and used 2 timing belt rubber straps for

vibration damping at rear. On the front I installed a rather expensive

stainless braided flex coupling from the local autoparts store. You
have to
ensure that the engine exhaust and Swiss muffler have plenty of flex
between
them or it will rip the Swiss Muffler to bits. I can send pic's if you
are
interested.

Frank



On 5/28/2003 5:13 AM, LATER wrote to HDICK@IAW.ON.CA:

-> I've been looking at it with interest. Main concern was how to
insure that
it
-> stays on. Don't know anyone that's done it. later
->
-> On 5/27/2003 1:30 PM, HDICK@IAW.ON.CA wrote to MURPHY-REBEL:
->
-> -> From <hdick@iaw.on.ca> Thu, 22 May 2003 11:57:25 -0800 remote
from
-> dcsol.com
-> -> Received: by dcsol.com (Wildcat! SMTP Router v5.6.450.61)
-> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 11:57:25
-0800
-> -> Received: from canal.iaw.on.ca ([209.5.112.33])
EHLO=canal.iaw.on.ca
-> -> by dcsol.com (Wildcat! SMTP v5.6.450.61) with SMTP
-> -> id 1370750671; Thu, 22 May 2003 11:57:24 -0800
-> -> Received: from as4-13.iaw.on.ca ([209.5.117.152] helo=hdick)
-> -> by canal.iaw.on.ca with smtp (Exim 4.05)
-> -> id 19IwBj-0003wP-00
-> -> for murphy-rebel@dcsol.com; Thu, 22 May 2003 15:57:20 -0400
-> -> Message-ID: <001001c3209c$a99afe40$987505d1@hdick>
-> -> From: "Harold Dick" <hdick@iaw.on.ca>
-> -> To: <murphy-rebel@dcsol.com>
-> -> Subject: swiss muffler
-> -> Date: Thu, 22 May 2003 15:59:30 -0400
-> -> X-Orig-MIME-Version: 1.0
-> -> X-Orig-Content-Type: multipart/alternative; boundary="----
-> =_NextPart_000_000D_01C3207B.2162DFA0"
-> -> X-Priority: 3
-> -> X-MSMail-Priority: Normal
-> -> X-Mailer: Microsoft Outlook Express 5.00.2615.200
-> -> X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
-> ->
-> -> Has anyone tried or heard of anyone experimenting with the Swiss
style
-> -> muffler system on an engine as large as an O-320?
-> -> Harold Dick
-> -> 633E
-> ->
->
->





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