X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3847693 for flyrotary@lancaironline.net; Sat, 12 Sep 2009 11:12:23 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao102.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090912151148.KRSE12000.fed1rmmtao102.cox.net@fed1rmimpo02.cox.net> for ; Sat, 12 Sep 2009 11:11:48 -0400 Received: from wills ([68.105.80.138]) by fed1rmimpo02.cox.net with bizsmtp id frBm1c0012z3ATG04rBnkR; Sat, 12 Sep 2009 11:11:47 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=qI_j9ARKvQsA:10 a=N8B9JuSIAAAA:8 a=pgTn_jI8SpuoqQCzBc4A:9 a=nzP_SO3Ac0Cn2I2o8-0YZtlyYCgA:4 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=Ob343VDOjwobhexsXG0A:9 a=Rqd8X6Aoi9ev-MptCcIA:7 a=GQN78OCYD0tBjrhDcm3DQCCB9VcA:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 X-CM-Score: 0.00 Message-ID: <11F2DC31B2BE41B7AED29CDF99CE8AAA@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Moroso Spiral Muffler final report Date: Sat, 12 Sep 2009 08:11:46 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01CA3380.AC1CF5D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0013_01CA3380.AC1CF5D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've flown with my DNA muffler for a couple of hours now and conclude = that it is no more effective at muffling than the home made muffler. = Since it will require more work to fully integrate the DNA than to go = back to the original muffler, I'm going to put the original back on. = Maybe the DNA will find its way onto my kit car someday. Mike Wills RV-4 N144WM ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Friday, September 11, 2009 5:50 PM Subject: [FlyRotary] Moroso Spiral Muffler final report I was pretty happy with the Moroso muffer at first. Only 3 lbs, = sleek, sturdy, good looking, and toned things down perfectly. But = because I never really rage around at full power, I didn't realize how = much power it was costing me. Coming home from Vans homecoming I flew = with a couple guys with 180hp c/s props and was sad to discover that I = just couldnt keep up... gadas! I fugured it might be the new muffler, = so I did a couple of test runs at WOT (number from my guages - a little = faster than actual): moroso spiral No Muffler Fuel = flow matched (throttled back some) D Alt 9200 9400 = 9400 IAS 148kts 159kts = 151kts TAS 168kts 183kts = 172kts RPM 5600 5950 = 5700 MP 27.2 30.3 = 26.9 Fuel Flow 12gph 15.5gph = 12gph Obviously, that muffler will fly never again. Sure is good to have my = power back. Maybe the hollowed out flowmaster will be back some day... = But it is kinda heavy... Note, I am still a little slower than with the wastegate closed and = 2-bladed prop... but close enough. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------=_NextPart_000_0013_01CA3380.AC1CF5D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I've flown with my DNA muffler for a = couple of=20 hours now and conclude that it is no more effective at muffling than the = home=20 made muffler. Since it will require more work to fully integrate the DNA = than to=20 go back to the original muffler, I'm going to put the original back on. = Maybe=20 the DNA will find its way onto my kit car someday.
 
Mike Wills
RV-4 N144WM
----- Original Message -----
From:=20 David=20 Leonard
Sent: Friday, September 11, = 2009 5:50=20 PM
Subject: [FlyRotary] Moroso = Spiral=20 Muffler final report

I was pretty happy with the Moroso muffer at = first.  Only=20 3 lbs, sleek, sturdy, good looking, and toned things down = perfectly.  But=20 because I never really rage around at full power, I didn't realize how = much=20 power it was costing me.  Coming home from Vans homecoming I flew = with a=20 couple guys with 180hp c/s props and was sad to discover that I just = couldnt=20 keep up... gadas!  I fugured it might be the new muffler, so I = did a=20 couple of test runs at WOT (number from my guages - a little faster = than=20 actual):

              =  =20      moroso=20 = spiral           &= nbsp;=20 No Muffler         Fuel flow = matched=20 (throttled back some)
D=20 = Alt           &nbs= p;    =20 = 9200           &nb= sp;           &nbs= p;=20 = 9400           &nb= sp;     =20 = 9400
IAS          &n= bsp;       =20 = 148kts           &= nbsp;         =20 = 159kts           &= nbsp;  =20 = 151kts
TAS          =        =20 = 168kts           &= nbsp;         =20 = 183kts           &= nbsp;  =20 = 172kts
RPM          =       =20 = 5600           &nb= sp;           &nbs= p;=20 = 5950           &nb= sp;     =20 = 5700
MP          &nb= sp;       =20 = 27.2           &nb= sp;           &nbs= p; =20 = 30.3           &nb= sp;      =20 26.9
Fuel = Flow         =20 = 12gph           &n= bsp;          =20 = 15.5gph           =   =20 12gph

Obviously, that muffler will fly never again. Sure is = good to=20 have my power back.  Maybe the hollowed out flowmaster will be = back some=20 day...  But it is kinda heavy...

Note, I am still a little = slower=20 than with the wastegate closed and 2-bladed prop...  but close=20 enough.
--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.nethttp://RotaryRoster.net
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