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 5.2.11) with ESMTP id 3410171 for flyrotary@lancaironline.net; Sun, 04 Jan 2009 11:21:39 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090104162057.RHBN2342.fed1rmmtao102.cox.net@fed1rmimpo03.cox.net> for ; Sun, 4 Jan 2009 11:20:57 -0500 Received: from wills ([68.105.85.56]) by fed1rmimpo03.cox.net with bizsmtp id zULu1a0041CvZmk04ULwPy; Sun, 04 Jan 2009 11:20:56 -0500 X-Authority-Analysis: v=1.0 c=1 a=NSHW2kUv_6QA:10 a=Zgn9d7bnwx8A:10 a=kviXuzpPAAAA:8 a=imb52oXmd0a2FWnJnGUA:9 a=o7Lv9QDSVyu3f2gTQScA:7 a=DxBDMF8GgbbrMrRgi21lG689wkEA:4 a=4vB-4DCPJfMA:10 a=oH_WKSxD8ioA:10 a=oYrQGgEluADWCd2rptEA:9 a=8DgQBsHXV83AHJoolscA:7 a=3EPjpQZMNQKY7hHXQl7ZeswH-mAA:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=AfD3MYMu9mQA:10 X-CM-Score: 0.00 Message-ID: <001d01c96e88$6c047990$38556944@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: 20B install issues overcome Date: Sun, 4 Jan 2009 08:20:55 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C96E45.5D903360" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C96E45.5D903360 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable My home made "spiral flow" muffler isnt (a muffler that is). Other than = a couple of the older biz jets and the Piaggio Avanti canard turboprop, = I am the loudest airplane on the airport. Unfortunately the RV-4 simply = doesnt have the room for most mufflers without something big and ugly = dangling in the breeze. In my opinion this is the most significant short = coming of the 13B install to date. I HAVE to come up with something = better. Mike Wills N144MW ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 04, 2009 3:39 AM Subject: [FlyRotary] Re: 20B install issues overcome Agree. Unfortunately, that's not a comment I hear. On the contrary, = they usually tell me that they can hear me before they can see me. ;-( = Mark S. ANR headsets mandatory On Sun, Jan 4, 2009 at 12:22 AM, Al Gietzen = wrote: I'm presently gathering materials to fabricate a tangential muffler = made from inconel, similar to your design. I take it from your report = that your muffler is holding up well? =20 Mark S. So far it is doing fine. And the inconel tangential and the 321SS = secondary muffler (my own design) quiet it down nicely. A few days ago = I picked up my brother to go for a ride, while my sister-in-law waited = and watched other planes come and go. When we got back her remark was = that my plane was quieter than all the rest. I consider that to be = 'expert testimony'J. Al G On Sat, Jan 3, 2009 at 5:47 PM, Al Gietzen = wrote: Al,=20 That's a great shot. Have you had any "significant issues" with = your install? If so, how did you overcome them? Mark S. =20 I had 2 issues that required some time and determination. The first = was the RWS EC2. I had an early version for the 3-rotor, and perhaps = the first installed in a composite airplane. I had some kind of = electrical noise related corruption of settings which persisted through = a lot of effort for over a years time. It has been resolved, and the = engine running fine. That has been discussed here more than once in the = past. The other was less-than-expected performance of an oil cooler built = into the wing root, without much of a scoop for the inlet below the = wing. The theory was that the differential pressure below/above the = wing would help provide the necessary air flow. Not the case here as = the location is too far back on the wing; and behind the strake (the = inboard section on the canard airplane). The pressure differential = turned out to be only about 1" H20 =96 very little help. I added a ram = scoop, and installed a small oil/water heat exchanger in the cowl. = Currently oil temps are fine, and the coolant temp is running a bit = lower than I like at cruise. I may eventually install some sort of air = flow adjustment, or even consider installing a thermostat in the engine. = You may recall discussion of these changes here in the past as well. I'm just past 140 hours flying time, and feel quite fortunate with = how well things have worked out. Performance and economy are great. Al G http://members.cox.net/alg3/airplane.htm ------=_NextPart_000_001A_01C96E45.5D903360 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
My home made "spiral flow" muffler isnt = (a muffler=20 that is). Other than a couple of the older biz jets and the Piaggio = Avanti=20 canard turboprop, I am the loudest airplane on the airport. = Unfortunately the=20 RV-4 simply doesnt have the room for most mufflers without something big = and=20 ugly dangling in the breeze. In my opinion this is the most significant = short=20 coming of the 13B install to date. I HAVE to come up with something=20 better.
 
Mike Wills
N144MW
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Sunday, January 04, 2009 = 3:39=20 AM
Subject: [FlyRotary] Re: 20B = install=20 issues overcome

Agree.  Unfortunately, that's not a comment I = hear. =20 On the contrary, they usually tell me that they can hear me before = they can=20 see me.  ;-( 

Mark S.
ANR headsets = mandatory

On Sun, Jan 4, 2009 at 12:22 AM, Al Gietzen = <ALVentures@cox.net> = wrote:

I'm presently=20 gathering materials to fabricate a tangential muffler made from = inconel,=20 similar to your design.  I take it from your report that your = muffler=20 is holding up well?        

Mark=20 S.

 

So far = it is=20 doing fine.  And the inconel tangential and the 321SS secondary = muffler=20 (my own design) quiet it down nicely.  A few days ago I picked = up my=20 brother to go for a ride, while my sister-in-law waited and watched = other=20 planes come and go.  When we got back her remark was that my = plane was=20 quieter than all the rest.  I consider that to be 'expert=20 testimony'J.

Al=20 G

On Sat, Jan 3, 2009 at 5:47 = PM, Al=20 Gietzen <ALVentures@cox.net> wrote:

Al,=20

That's a great shot.  Have you had any "significant = issues"=20 with your install?  If so, how did you overcome them?
Mark = S. =20

I had 2 = issues=20 that required some time and determination. The first was the RWS = EC2. =20 I had an early version for the 3-rotor, and perhaps the first = installed in a=20 composite airplane.  I had some kind of electrical noise = related=20 corruption of settings which persisted through a lot of effort for = over a=20 years time. It has been resolved, and the engine running fine.  = That=20 has been discussed here more than once in the = past.

The = other was=20 less-than-expected performance of an oil cooler built into the wing = root,=20 without much of a scoop for the inlet below the wing.  The = theory was=20 that the differential pressure below/above the wing would help = provide the=20 necessary air flow.  Not the case here as the location is too = far back=20 on the wing; and behind the strake (the inboard section on the = canard=20 airplane).  The pressure differential turned out to be only = about 1"=20 H20 =96 very little help.  I added a ram scoop, and installed a = small=20 oil/water heat exchanger in the cowl.  Currently oil temps are = fine,=20 and the coolant temp is running a bit lower than I like at = cruise.  I=20 may eventually install some sort of air flow adjustment, or even = consider=20 installing a thermostat in the engine.  You may recall = discussion of=20 these changes here in the past as well.

I'm = just past 140=20 hours flying time, and feel quite fortunate with how well things = have worked=20 out.  Performance and economy are great.

Al = G  =20 http://members.cox.net/alg3/airplane.htm

 

 

 


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