X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm16-vm1.bullet.mail.ne1.yahoo.com ([98.138.91.47] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTPS id 6693102 for flyrotary@lancaironline.net; Sat, 18 Jan 2014 18:07:53 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.91.47; envelope-from=kjohnsondds@yahoo.com Received: from [98.138.100.112] by nm16.bullet.mail.ne1.yahoo.com with NNFMP; 18 Jan 2014 23:07:17 -0000 Received: from [98.138.101.174] by tm103.bullet.mail.ne1.yahoo.com with NNFMP; 18 Jan 2014 23:07:17 -0000 Received: from [127.0.0.1] by omp1085.mail.ne1.yahoo.com with NNFMP; 18 Jan 2014 23:07:17 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 157341.84686.bm@omp1085.mail.ne1.yahoo.com Received: (qmail 66372 invoked by uid 60001); 18 Jan 2014 23:07:17 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1390086437; bh=5H8+YDslagF3oXbgMYA8u0+qu7Q9GSjtb+Zjn5UD3e0=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=dqJI9QtbFVRaYmLl2YrdtNE05wo25jusL7Rd958d1g1HispPb3Gt+wL2QHFUUQY410xT3zVEEvZU9I2s0ZQrXYhSZCUg7iS6lbrBFQGubsHDrgD8MinWKzfMOypxkj3tY5CMWWgJ7fQ/XBhWQ+sWzEI9qC5TA60FsvvIzlPu3fg= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=h0XPcTIo18K0ie4LjnWB5kAHc/uKniyoPcuxkQgbjLpnTtXvR8G2/CWXEfVInFjkDdXxh4IdVsW5CXwi4mObLgpHzjLk6FnymgTNOKw/1tonsFuSUEQSHETWlwHQVCcRlKsoi89xO6VGoLYiVTQT7Y9uXOOlx51DZodLFjP/5AA=; X-YMail-OSG: VqSBBXkVM1mMxMdE0dCeMzryPrFQcYcJC3BCcEn61Kaismc iJQijL1GS_Jq.6xkqCDFVfDV0porauhyEgiH8I9cyMRJtb.E5sNUMB3xAiEL dhKlYJDBYNYAHD2RX8Ezzsaoe9rfkamoS6BOa_KY4_ItQ3aLGZ7uGDOvtrgY J8jk.gP5DR7.3mwC_h7vgOQkI6fedlqKAUhlPtda4tIdm4YXLZ3WpkLwMtf2 0roUOTr.2sgFp4HP9CvkJyuINPRrM.S1B6gJVwjQJ5IKJrnvQPoTLg0.PsHZ Fw1DajMf2jAZ2qZ85BGKrluZ6gtZ_6cyMiOfhB3_rQUnRiq_lZwCMx8lA30i hiUluFpPQMPq_4MTQtCd6hxmORbgvBN_XqWkQ2OuszcLYTpCCLx2wFkPC1vE gXsSKyn2jlUn8uxgN1D_c5WXqpI.XfS2ZkoDbkHmXrVhjnUVi2uRXiQ3jrmk 4QJLVNMlC4Hvns4WA_BukQyi4Z5sRoRR5o4NXNhqU7oafkthlBYfXhvkQeKN cTZ7ko2PQa18I5QnAcbo9jvh4TckukUBLsjU4e0xDFs4EhxfigAJEICrM.DO 1_9Bl_DlEqF4JuHyg4h_w9cX0PtJr5o5UdB0wqyLQ1n.jIroRpQ6c7pfpsPY IbCVH7XPNKC4ik5C8SSOxzOQ2fJsUoK0sZnOzQSN0RXCBjFPEjUV0U.ahKuo WKfS3CgoB2.CfIY11_xlsP0ZnbIYh19hDLlDv4y3seQ8Il9P3Tr8ErJ5FO_2 tQAKgc24uPIXa8dEzBx9AuxOlRrggjSss9KxmVFBcUS5nlz6yiKBVMt2I43P cqLTtGaVoxUPC_DaDb2PH39D65YkjyHctRA-- Received: from [68.113.254.146] by web125503.mail.ne1.yahoo.com via HTTP; Sat, 18 Jan 2014 15:07:16 PST X-Rocket-MIMEInfo: 002.001,SW4gcGFzdCBkaXNjdXNzaW9ucywgdGhlIEh1c2hwb3dlciBJSSB3YXMgcmVjb21tZW5kZWQuwqAgSW5pdGlhbGx5LCBJIGRlc2lnbmVkIG15IGV4aGF1c3Qgc3lzdGVtIG9uIG15IDEzYiBOQSBlbmdpbmUgd2l0aCB0d28gZXhoYXVzdCBwaXBlcyBhbmQgdHdvIG11ZmZsZXJzIHRoYXQgd2VyZSBtb3VudGVkIHVuZGVyIG15IGZ1c2VsYWdlLsKgIFNpbmNlIHRoZW4sIEkgZGVjaWRlZCB0byBwdXQgdGhlIG11ZmZsZXIgaW5zaWRlIHRoZSBjb3dsLsKgIEFsbCBvZiB0aGF0IG1lYW5zIGlzIHRoYXQgSSBoYXZlIGEBMAEBAQE- X-Mailer: YahooMailWebService/0.8.173.622 References: Message-ID: <1390086436.10920.YahooMailNeo@web125503.mail.ne1.yahoo.com> Date: Sat, 18 Jan 2014 15:07:16 -0800 (PST) From: Kenneth Johnson Reply-To: Kenneth Johnson Subject: Re: [FlyRotary] Re: muffler for Renesis? To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-2005986409-1612920934-1390086436=:10920" ---2005986409-1612920934-1390086436=:10920 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable In past discussions, the Hushpower II was recommended.=A0 Initially, I desi= gned my exhaust system on my 13b NA engine with two exhaust pipes and two m= ufflers that were mounted under my fuselage.=A0 Since then, I decided to pu= t the muffler inside the cowl.=A0 All of that means is that I have an extra= muffler.=A0 =0A=0ASo, I have a new Hushpower II muffler that's for sale at= half the cost.=A0 The dimensions are 23 x 5 1/2 x 4 inches.=A0 Inlet and e= xit pipes are 2 1/4 inches.=0A=0AKen Johnson=0A=0A=0A=0A=0A=0AOn Saturday, = January 18, 2014 3:17 PM, Bob Tilley wrote:=0A =0AChief= =0A=0AWe'll there is your problem!!! =A0;-)=0A=0AYou should be in a Cozy. T= hen the sound will be way behind you!!=A0=0A=0ABob Tilley=0AN49JB=0A=0AOn J= an 18, 2014, at 1:10 PM, shipchief@aol.com wrote:=0A=0A=0AI'm running a tur= bo, and it's still pretty loud. After I take off and climb out, I find myse= lf reducing power to reduce the sound level. =0A>It's pretty quiet at idle = and during=A0ground operations, but above 5000 RPM which is above 34"Hg man= ifold pressure, it's too loud inside the cockpit for me.=0A>My TO4 turbine = outlet faces aft into a reducer cone transition to a 2" pipe. This pipe has= two 90 degree bends and lets out parallel to the air exit ramp on the bott= om of the fuselage of my RV-8.=0A>I'm thinking the sound waves need to be d= irected away from the fuselage skin, so I ordered a slip on exhaust turndow= n tip (Walker 41420) and a lap joint band clamp.=0A>Even with that, I would= like to be a good neighbor. I'm planning to=A0flatten the turndown to a 1"= rectangular outlet, and drill 18 ea 3/8" holes in the down facing flat. Th= en use a 3/8" diameter rod to bend each hole into a slightly rear facing sh= ape.=0A>I believe the term is "Piccolo Pipe".=0A>I have a Hushpower muffler= , which I bought after Tracy made his first report on it. I just checked it= out (box is pretty dusty, time must have slipped by somehow?) That thing w= eighs alot. Also, the idea that the 'innards' might break loose and clog th= e outlet seems a bit scarey.=0A>The Aeroturbine would=A0look better hanging= under the fuselage tho- if I end up needing a real muffler. (might need to= clamp on 4 big fins at the back for aerodynamic guidance +=A0asthetics?)= =0A>=0A>-----Original Message-----=0A>From: Charlie England =0A>To: Rotary motors in aircraft =0A>S= ent: Sat, Jan 18, 2014 9:23 am=0A>Subject: [FlyRotary] Re: muffler for Rene= sis?=0A>=0A>=0A>Thanks, Mark. I discovered that after I sent the previous m= essage. Their =0Aweb site seems to have a somewhat random 'organization'. I= s the non-res model only 20" overall, as they describe? That would make =0A= it only slightly longer than the H.P. resonator that Dennis is using, & =0A= since it appears to be only a perforated tube in the main cylinder, it =0As= hould survive much better than anything with actual baffles and/or packing.= Charlie On 1/18/2014 9:38 AM, Mark Steitle wrote:=0A> Charlie,=0A> They st= ock two types, one with packing, one without. The one with packing is =0At= heir "resonator"model, and it is longer than the non-res model. I bought t= he =0Anon-res model as I figured the packing was only temporary. I have no= t installed =0Ait yet, so no flight report.=0A>=0A> Mark=0A>=0A> Sent from = my iPad=0A>=0A>> On Jan 18, 2014, at 8:54 AM, Charlie England wrote:=0A>>=0A>> Thanks, Tracy; it's good news that it is both qu= iet and survives. Didn't =0Arealize that the aeroturbine had packing in it.= If it performs as well as, or =0Abetter than the hushpower, I may give it = a shot. It's actually a bit cheaper =0Athan the h.p. resonator.=0A>>=0A>> C= harlie=0A>>=0A>>> On 1/17/2014 10:53 AM, Tracy wrote:=0A>>> The aero turbin= e sounded better than the Hushpower II but both change in =0Atone over tim= e, probably due to packing deteriorating. Still, the AT was the =0Abest a= fter they stabilized.=0A>>>=0A>>> Tracy=0A>>>=0A>>> Sent from my iPad=0A>>>= =0A>>>> On Jan 17, 2014, at 11:06, Charlie England w= rote:=0A>>>>=0A>>>> Time to order a muffler. My goal is to keep it inside t= he cowl (RV-7). I =0Aknow, I know, but it looks better, and more important,= it *sounds* better.=0A>>>>=0A>>>> I believe that Dennis H. used this:=0A>>= >> http://www.summitracing.com/parts/hsh-12412400/overview/ >>>> I know it = sounds great. Dennis, do you remember the weight of just the =0Aresonator?= =0A>>>>=0A>>>> I know that Tracy is running an Aeroturbine (weight: 6 lbs o= n the 20B in =0Athe RV-8, & has talked about how good it sounds:=0A>>>> htt= p://www.aeroexhaust.com/mufflers/aero-exhaust-at2525.html >>>>=0A>>>> They = are roughly the same size and price, so I'm wondering how the =0AAeroturbin= e will compare in performance (meaning: killing the harsh harmonics of =0At= he rotary).=0A>>>>=0A>>>> Tracy, you might be the only person who's heard b= oth on a rotary. Based on =0Ayour 20B experience, is it likely to work bett= er than the Hushpower Resonator on =0Aa Renesis? I'll be using a manifold/t= ransition pipe similar to Dennis' setup to =0Akeep everything inside the co= wl.=0A>>>>=0A>>>> Thanks,=0A>>>>=0A>>>> Charlie=0A>>>>=0A>>>>=0A>>>>=0A>>>>= --=0A>>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: http= ://mail.lancaironline.net:81/lists/flyrotary/List.html >>> --=0A>>> Homepag= e: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironli= ne.net:81/lists/flyrotary/List.html >>=0A>> --=0A>> Homepage: http://www.fl= yrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/f= lyrotary/List.html > --=0A> Homepage: http://www.flyrotary.com/ > Archive a= nd UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --=0AH= omepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancairon= line.net:81/lists/flyrotary/List.html ---2005986409-1612920934-1390086436=:10920 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
In past discussions, the Hushpower II was recommended.  = Initially, I designed my exhaust system on my 13b NA engine with two exhaus= t pipes and two mufflers that were mounted under my fuselage.  Since t= hen, I decided to put the muffler inside the cowl.  All of that means = is that I have an extra muffler. 

So, I have a new Hushpower I= I muffler that's for sale at half the cost.  The dimensions are 23 x 5= 1/2 x 4 inches.  Inlet and exit pipes are 2 1/4 inches.

Ken Jo= hnson



=
On Saturday, January 18, 2014 3:17 PM, Bob Tilley &l= t;btilley@mchsi.com> wrote:
Chief

W= e'll there is your problem!!!  ;-)

You should= be in a Cozy. Then the sound will be way behind you!! 

=
Bob Tilley
N49JB

On Jan 18, 2014, at 1:1= 0 PM, shipchief@aol.com wrote:
=0A
I'm running a turbo, and it's still pretty loud. After I= take off and climb out, I find myself reducing power to reduce the sound l= evel.
=0A=0A=0A
It's pretty quiet at idle and during ground = operations, but above 5000 RPM which is above 34"Hg manifold pressure, it's= too loud inside the cockpit for me.
=0A=0A=0A
My TO4 turbine outl= et faces aft into a reducer cone transition to a 2" pipe. This pipe has two= 90 degree bends and lets out parallel to the air exit ramp on the bottom o= f the fuselage of my RV-8.
=0A=0A=0A
I'm thinking the sound waves = need to be directed away from the fuselage skin, so I ordered a slip on exh= aust turndown tip (Walker 41420) and a lap joint band clamp.
=0AEven wit= h that, I would like to be a good neighbor. I'm planning to flatten th= e turndown to a 1" rectangular outlet, and drill 18 ea 3/8" holes in the do= wn facing flat. Then use a 3/8" diameter rod to bend each hole into a sligh= tly rear facing shape.
=0A=0A=0A
I believe the term is "Piccolo Pi= pe".
=0AI have a Hushpower muffler, which I bought after Tracy made his = first report on it. I just checked it out (box is pretty dusty, time must h= ave slipped by somehow?) That thing weighs alot. Also, the idea that the 'i= nnards' might break loose and clog the outlet seems a bit scarey.
=0A= =0A=0A
The Aeroturbine would look better hanging under the fuselag= e tho- if I end up needing a real muffler. (might need to clamp on 4 big fi= ns at the back for aerodynamic guidance + asthetics?)
=0A
=0A= =0A=0A
-----Original Message-----
=0AFrom: Charlie England <ceengland7@gmail.com>
=0ATo: Rotary mo= tors in aircraft <= flyrotary@lancaironline.net>
=0ASent: Sat, Jan 18, 2014 9:23 am=0ASubject: [FlyRotary] Re: muffler for Renesis?
=0A
=0A=0A=0A
Than=
ks, Mark. I discovered that after I sent the previous message. Their =0Aweb=
 site seems to have a somewhat random 'organization'.=0A=0AIs the non-res m=
odel only 20" overall, as they describe? That would make =0Ait only slightl=
y longer than the H.P. resonator that Dennis is using, & =0Asince it ap=
pears to be only a perforated tube in the main cylinder, it =0Ashould survi=
ve much better than anything with actual baffles and/or packing.=0A=0ACharl=
ie=0A=0AOn 1/18/2014 9:38 AM, Mark Steitle wrote:=0A> Charlie,=0A> Th=
ey stock two types, one with packing, one without.  The one with packing is=
 =0Atheir "resonator"model, and it is longer than the non-res model.  I bou=
ght the =0Anon-res model as I figured the packing was only temporary.  I ha=
ve not installed =0Ait yet, so no flight report.=0A>=0A> Mark=0A>=
=0A> Sent from my iPad=0A>=0A>> On Jan 18, 2014, at 8:54 AM, Ch=
arlie England <ceengland7@gmail.=
com> wrote:=0A>>=0A>> Thanks, Tracy; it's good news that=
 it is both quiet and survives. Didn't =0Arealize that the aeroturbine had =
packing in it. If it performs as well as, or =0Abetter than the hushpower, =
I may give it a shot. It's actually a bit cheaper =0Athan the h.p. resonato=
r.=0A>>=0A>> Charlie=0A>>=0A>>> On 1/17/2014 10:=
53 AM, Tracy wrote:=0A>>> The aero turbine sounded better than the=
 Hushpower II  but both change in =0Atone over time, probably due to packin=
g deteriorating.   Still, the AT was the =0Abest after they stabilized.=0A&=
gt;>>=0A>>> Tracy=0A>>>=0A>>> Sent from my=
 iPad=0A>>>=0A>>>> On Jan 17, 2014, at 11:06, Charlie =
England <ceengland7@gmail.com> wrote:=0A>>>>=0A>>>> Time to order a muffler.=
 My goal is to keep it inside the cowl (RV-7). I =0Aknow, I know, but it lo=
oks better, and more important, it *sounds* better.=0A>>>>=0A&g=
t;>>> I believe that Dennis H. used this:=0A>>>> http://www.summitracing.com/parts/hsh-12412400/over=
view/=0A>>>> I know it sounds great. Dennis, do you remembe=
r the weight of just the =0Aresonator?=0A>>>>=0A>>>>=
; I know that Tracy is running an Aeroturbine (weight: 6 lbs on the 20B in =
=0Athe RV-8, & has talked about how good it sounds:=0A>>>> =
http://www.aeroexhaust.com/mufflers/aero-e=
xhaust-at2525.html=0A>>>>=0A>>>> They are rough=
ly the same size and price, so I'm wondering how the =0AAeroturbine will co=
mpare in performance (meaning: killing the harsh harmonics of =0Athe rotary=
).=0A>>>>=0A>>>> Tracy, you might be the only perso=
n who's heard both on a rotary. Based on =0Ayour 20B experience, is it like=
ly to work better than the Hushpower Resonator on =0Aa Renesis? I'll be usi=
ng a manifold/transition pipe similar to Dennis' setup to =0Akeep everythin=
g inside the cowl.=0A>>>>=0A>>>> Thanks,=0A>>=
>>=0A>>>> Charlie=0A>>>>=0A>>>>=
=0A>>>>=0A>>>> --=0A>>>> Homepage:  http:=
//www.flyrotary.com/=0A>>>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
.html=0A>>> --=0A>>> Homepage:  http://www.flyrotary.co=
m/=0A>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html=0A>>=
=0A>> --=0A>> Homepage:  http://www.flyrotary.com/=0A>>=
 Archive and UnSub:   http://mail.lancairon=
line.net:81/lists/flyrotary/List.html=0A> --=0A> Homepage:  http://=
www.flyrotary.com/=0A> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html=0A=
=0A=0A--=0AHomepage:  http://www.flyrotary.com/=0AArchive and UnSub:   http://mail.lancaironline.net:81/lists/flyrot=
ary/List.html=0A
=0A
=0A
=


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