X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp106.sbc.mail.re2.yahoo.com ([68.142.229.99] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with SMTP id 3847144 for flyrotary@lancaironline.net; Fri, 11 Sep 2009 21:35:58 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.229.99; envelope-from=downing.j@sbcglobal.net Received: (qmail 46119 invoked from network); 12 Sep 2009 01:35:24 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:In-Reply-To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=lM3uK9FYgICF7sqWb5d/I3LxoZUyodkREIt4GQBkDuMxmbVWuq0Rj4cIuIuF74xJYD0P2l+rgH6umEFkbiJp/EBOgmkahxAF79QRr0XD0B8wnhsgzUG38UdJDiwZE7asjS9TBlY3BwGjKZikXZirpI7cG6imHmCPUFcDI4MiahY= ; Received: from unknown (HELO JohnPC) (downing.j@76.210.117.18 with login) by smtp106.sbc.mail.re2.yahoo.com with SMTP; 12 Sep 2009 01:35:23 -0000 X-YMail-OSG: Q7CsRjAVM1n_yUOjw75KCR770Oem6d6s9DaAStC9nSsvvQO3vwxhtEgHyP9RdErZnup2so8ga.rUk6WZOZMP.2X9PhCwVZbquaiLIbN9z0a__ZIi_FUSdoT.7lOM6__ZJmWdPN3kTCshIb5tr0PfQa_CCYqZDDQwAxWQF5vXfOlKwKBVTF3ZpRPqFS3ZinUhbkHJBKPvpuPWW7mecrnbNgXA.MMV_OxGcDtl_E1rFPXjXjnPWBcnHulXifHILf4cbB6j2Ea81lGlC_EErYvkImbHmmVmDqyihC.CJVH5sFRr4iafoszkkQGKxtbhC6J5ouMmAyBwxJcR1fX7ACz6W.FscRzIuQ-- X-Yahoo-Newman-Property: ymail-3 Message-ID: <9A83FEC4A8354170830541C8901A2D51@JohnPC> From: "John" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Moroso Spiral Muffler final report Date: Fri, 11 Sep 2009 21:36:19 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0042_01CA3327.E68B7240" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18005 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 This is a multi-part message in MIME format. ------=_NextPart_000_0042_01CA3327.E68B7240 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dave, as long as you are experimenting, cut 1/3 of the length and see = what the results are. I sent in my paper work today to the DAR, so I'm = getting close to blowing the guts out of the Hushpower II. JohnD ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Friday, September 11, 2009 8:50 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_0042_01CA3327.E68B7240 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Dave, as long as you are experimenting, = cut 1/3 of=20 the length and see what the results are.  I sent in my paper work = today to=20 the DAR, so I'm getting close to blowing the guts out of the Hushpower = II. =20 JohnD
----- Original Message -----
From:=20 David=20 Leonard
Sent: Friday, September 11, = 2009 8:50=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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