X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f52.google.com ([209.85.161.52] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4952245 for flyrotary@lancaironline.net; Wed, 20 Apr 2011 13:07:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.52; envelope-from=msteitle@gmail.com Received: by fxm6 with SMTP id 6so520942fxm.25 for ; Wed, 20 Apr 2011 10:07:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=sxmZ87AWfFBZk2AUlo/8u8wJm730gxAMBIBypY5x/3E=; b=sYvtq1xWyXnfJWb6dHhJzKSisiCN14jzzGI0MJCDC5fVGCkRSJBP3hneOvPZiAk29r 2S7JXZURZBAK8wS1AMQWVq9avMdii4B3sh4pV5FpUDZSiy8EAE/A4c4gT2Ox4gbG5nfU r7+mplYHSSToTJPkeS+e6JY1H/58jwNrVTLWE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=dh9g/VztZA+FE/CBvVXvtZ90oA6opLwjqf9So7Q+BdP3VFW+Il92lkfMnlfiSeQdCA VerKoEUHN1f18T6SXiVnD9korc1b/2tuj0qpMAewSRT+hdpqcVITZh1hJGW0o6gD6COV 8o6tkme56jqv74xjmij7ZFXX27M8WhAYnzVvQ= MIME-Version: 1.0 Received: by 10.223.54.213 with SMTP id r21mr916655fag.54.1303319243609; Wed, 20 Apr 2011 10:07:23 -0700 (PDT) Received: by 10.223.102.141 with HTTP; Wed, 20 Apr 2011 10:07:23 -0700 (PDT) In-Reply-To: References: Date: Wed, 20 Apr 2011 12:07:23 -0500 Message-ID: Subject: Re: [FlyRotary] Re: Tangential Muffler From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015174735948b590004a15ca8c7 --0015174735948b590004a15ca8c7 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Yes it would, but it would add weight too. On Wed, Apr 20, 2011 at 11:56 AM, Thomas Giddings wrote: > Mark: Thanks...I was wondering if it would make it even quieter with less > risk of destroying it > Tom Giddings > VP Avionics Sales > MIDWEST AVIONICS > 200 Hardy Roberts Dr > PO Box 219 > West Paducah,KY 42086 > 877-904 9966 > Cell; 727 858-1772 > FAX:270 744 3466 > tom@midwestaviation.net > Online Store > www.midwest-avionics.com > > > On Apr 20, 2011, at 12:46 PM, Mark Steitle wrote: > > Tom, > > If you're running a turbo you shouldn't need a muffler. The turbo serves > the purpose of the muffler. > > Mark > > On Wed, Apr 20, 2011 at 11:37 AM, Thomas Giddings > wrote: > >> Would a turbo charged application be less of problem with a muffler? >> >> >> Tom Giddings >> VP Avionics Sales >> MIDWEST AVIONICS >> 200 Hardy Roberts Dr >> PO Box 219 >> West Paducah,KY 42086 >> 877-904 9966 >> Cell; 727 858-1772 >> FAX:270 744 3466 >> tom@midwestaviation.net >> Online Store >> www.midwest-avionics.com >> >> >> On Apr 20, 2011, at 12:25 PM, Steve Thomas wrote: >> >> Al, >> >> I'd love to have a good tangential solution. Mistral had developed one >> before they declared bankruptcy. But, their engineer told me that they = were >> loosing at least 5 HP with it. So, if I am ignorant, I am happy to be >> corrected. >> >> I presume that you have shared your design before? Can I find in in the >> archives? I am not a welder, so I have to hire any welding that needs t= o be >> done, so the cost of an Inconel device will be quite pricy, I presume. >> >> Burns Stainless wrote back to me and wants me to send the failed muffler >> to them for analyses. Should be interesting. >> >> Best Regards, >> >> Steve Thomas >> >> _______________________________________________________ >> >> >> >> >> >> On Apr 20, 2011, at 9:51 AM, Al Gietzen wrote: >> >> Steve wrote: >> >> >> 3. At 50% power, my fuel flow is 11 GPH rich and 9GPH lean. >> This doesn=92t seem right =96 at 50% power my 20B will run 9-10 gph lean= ed. >> >> >> The tangential style mufflers are too power-robbing >> My 20B got 265 hp at 6300 rpm on the dyno with the tangential muffler an= d >> secondary resonator. With 9.0 : 1 rotors and normally aspirated that=92s= not >> all bad. >> But perhaps more importantly I now have 213 hour on the inconel tangenti= al >> and 321 SS secondary; and they are still in good condition. And it is >> reasonably quiet. >> Al G >> >> >> >> >> >> > > --0015174735948b590004a15ca8c7 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Yes it would, but it would add weight too.


=A0
On Wed, Apr 20, 2011 at 11:56 AM, Thomas Gidding= s <tom@midw= estaviation.net> wrote:
Mark: Thanks...I was wondering if it w= ould make it even quieter with less risk of destroying it
Tom=A0Giddings
VP Avionics Sales
MIDWEST AVIONICS
200 Hardy Roberts = Dr
PO Box 219
West Paducah,KY 42086
877-904 9966
Cell; 727 858-17= 72
FAX:270 744 3466
tom@midwestaviation.net


On Apr 20, 2011, at 12:46 PM, Mark Steitle wrote:

Tom,
=A0
If you're running a turbo you shouldn't need a muffler.=A0 The= turbo serves the purpose of=A0the muffler.
=A0
Mark

On Wed, Apr 20, 2011 at 11:37 AM, Thomas Gidding= s <tom@midwestaviation.net> wrote:
=A0Would a turbo charged application b= e less of problem with a muffler?=20


Tom=A0Giddings
VP Avionics Sales
MIDWEST AVIONICS
200 Hardy Roberts = Dr
PO Box 219
West Paducah,KY 42086
877-904 9966
Cell; 727 858-17= 72
FAX:270 744 3466
tom@midwestaviation.net


On Apr 20, 2011, at 12:25 PM, Steve Thomas wrote:

Al,=A0=20

I'd love to have a good tangential solution. =A0Mistral had develo= ped one before they declared bankruptcy. =A0But, their engineer told me tha= t they were loosing at least 5 HP with it. =A0So, if I am ignorant, I am ha= ppy to be corrected. =A0

I presume that you have shared your design before? =A0Can I find in in= the archives? =A0I am not a welder, so I have to hire any welding that nee= ds to be done, so the cost of an Inconel device will be quite pricy, I pres= ume. =A0

Burns Stainless wrote back to me and wants me to send the failed muffl= er to them for analyses. =A0Should be interesting. =A0

Best Regards,

Steve Thomas<= br>
_______________________________________________________





On Apr 20, 2011, at 9:51 AM, Al Gietzen wrote:

Steve wrote:=

=A0

3. =A0At 50% power, my fuel flow is 11 GPH rich and 9= GPH lean.
This doesn=92t se= em right =96 at 50% power my 20B will run 9-10 gph leaned.

=A0

The tangential style mufflers are too power-robbin= g
My 20B got 265= hp at 6300 rpm on the dyno with the tangential muffler and secondary reson= ator. With 9.0 : 1 rotors and normally aspirated that=92s not all bad.
But perhaps mo= re importantly I now have 213 hour on the inconel tangential and 321 SS sec= ondary; and they are still in good condition. And it is reasonably quiet.
Al G

=A0






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