X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from exhub003-1.exch003intermedia.net ([207.5.74.28] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTPS id 3811914 for flyrotary@lancaironline.net; Thu, 13 Aug 2009 10:58:25 -0400 Received-SPF: none receiver=logan.com; client-ip=207.5.74.28; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by exhub003-1.exch003intermedia.net ([207.5.74.28]) with mapi; Thu, 13 Aug 2009 07:57:50 -0700 From: Jeff Whaley To: Rotary motors in aircraft Date: Thu, 13 Aug 2009 07:57:51 -0700 Subject: RE: [FlyRotary] Re: Moving muffler to belly Thread-Topic: [FlyRotary] Re: Moving muffler to belly Thread-Index: AcocIKqNml+KCkOYR4C3URLmb4sB+wAARdcg Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E0140E9AF0401EXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E0140E9AF0401EXVMBX0035e_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bobby, I have a belly mounted Hushpower as well, but mine slopes away from = the fuselage aft of the firewall. The belly panel is painted aluminum about= 2-3" above the muffler at closest point and shows no sign of heat damage. = I bolted a vertical attach tab to the firewall, made a SS circular strap t= o go around exhaust pipe, match-drilled all of the above, including muffler= and collector, then welded a =BC" rivet to the SS strap, followed by anoth= er =BC" hole which has an AN bolt lock-wired in place for good measure. I = attached the tailpipe in similar fashion and supported it on my landing gea= r Vees. The assembly is fairly heavy, so you will have to support it at bo= th ends ... i.e., some rivets to belly panel are most likely required. Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Ed Anderson Sent: Thursday, August 13, 2009 10:14 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Moving muffler to belly Bobby, I have my two Hushpower II mufflers slung on the bottom. The top of= the mufflers are approx 2-3" from the bottom and my paint. I have no addi= tional shielding although a sheet of SS with some sort of insulation (fiber= fax) would probably be a good idea. But, I never go around to it and the = paint is still there - no flaking, no bubbling. Now since I have 2 muffler= s, they likely do not get quite as hot as one muffler with all the exhaust = going through it. So your mileage may vary Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Bobby J. Hughes Sent: Thursday, August 13, 2009 10:08 AM To: Rotary motors in aircraft Subject: [FlyRotary] Moving muffler to belly I've had the plane down for a few weeks making several changes. I would lik= e to move my muffler out of the cowl to the airframe belly. How much space = should I leave between the top of the muffler and bottom skin? My exit fair= ing hangs down about 5" below the airframe. What have others done for heat = shielding \ paint protection? Since the floor pans are installed any riveti= ng will have to be with blind rivets. Don't really want to put a bunch of e= xtra holes in the skin for this experiment. Any advice or pictures would be= appreciated. Thanks, Bobby Hughes RV-10 __________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com --_000_C03ABB0A7362B84BB53D544B3C305E0E0140E9AF0401EXVMBX0035e_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Bobby, I have a belly mounted Hushpower as well, but mine sl= opes away from the fuselage aft of the firewall. The belly panel is painted alum= inum about 2-3” above the muffler at closest point and shows no sign of he= at damage.=A0 I bolted a vertical attach tab to the firewall, made a SS circul= ar strap to go around exhaust pipe, match-drilled all of the above, including muffler and collector, then welded a =BC” rivet to the SS strap, foll= owed by another =BC” hole which has an AN bolt lock-wired in place for goo= d measure.=A0 I attached the tailpipe in similar fashion and supported it on = my landing gear Vees.=A0 The assembly is fairly heavy, so you will have to sup= port it at both ends … i.e., some rivets to belly panel are most likely requi= red.

Jeff

 

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anders= on
Sent: Thursday, August 13, 2009 10:14 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Moving muffler to belly

 

Bobby, I have my two Hushpower II mufflers slung on the bottom.  The top of the mufflers are approx 2-3” from the bottom= and my paint.  I have no additional shielding although a sheet of SS with = some sort of insulation (fiber fax) would probably be a good idea.  But, I never go around to it and the paint is still there – no flaking, no bubbling.  Now since I have 2 mufflers, they likely do not get quite a= s hot as one muffler with all the exhaust going through it.  So your mil= eage may vary

 

Ed

 

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bobby J. Hughes
Sent: Thursday, August 13, 2009 10:08 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Moving muffler to belly

 

I've had the plane down for a few weeks making several changes. I would like to = move my muffler out of the cowl to the airframe belly. How much space should I l= eave between the top of the muffler and bottom skin? My exit fairing hangs down about 5" below the airframe. What have others done for heat shielding = \ paint protection? Since the floor pans are installed any riveting will have to be with blind rivets. Don't really want to put a bunch of extra hol= es in the skin for this experiment. Any advice or pictures would be appreciated.

 

Thanks,

 

Bobby Hughes

RV-10



__________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com



__________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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