X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4591000 for flyrotary@lancaironline.net; Wed, 24 Nov 2010 13:12:24 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=pepdxKapwHuwCZNFD5uob2wvham6E+RljB0uXw08FdQ= c=1 sm=0 a=r5KF4NIpl1wA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=wzN344fxAAAA:8 a=glYVDZ00AAAA:8 a=l0_d83TQG1B9XnpEkCgA:9 a=nOP1850W1eOHs57lC2l3dEASEfAA:4 a=wPNLvfGTeEIA:10 a=XCwpvLtFMdsA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=tWW7XAyqtAC-G20QyRoA:9 a=PORjo6p7DS-5hSsbY5UA:7 a=VqrJPmiaUpFjPj1YdY_6s1S6XegA:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:49664] helo=EdPC) by cdptpa-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id F7/39-19545-4655DEC4; Wed, 24 Nov 2010 18:11:48 +0000 Message-ID: <1B8AB10679764918A8D524508837117E@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Exhaust Cut-out was [FlyRotary] Re: Friends and Family.... Date: Wed, 24 Nov 2010 13:11:17 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01CB8BD9.14278710" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_0025_01CB8BD9.14278710 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Mark, Chris and the rest - Happy Thanksgiving - except for scrooge = Chris of course {:>) Mark, been thinking about your exhaust conundrum - clearly the least = exhaust back pressure is best for performance out of your PP - however, = as you have indicated the Wail of an unmuffered 20B PP port might force = you to get towed to 10,000 MSL before turning on the engine to comply = with noise abatement rules. Not a very viable solution. Got me to thinking about a similar problem back in the Hot rod days. = The solution was the "cut-out" - simply a valve in the exhaust system = that diverted the exhaust through the muffler when the sound police were = in near vicinity - and then when all was safe (like Chris not being = around {:>)), the valve was switched to divert the exhaust down a = straight pipe. I'm wonder whether that might not be a viable solution to having your = cake and eating it also? For most of us running stock or mild street = ports - its probably not worth the effort, but in you case it might be.=20 Here is a URL to cut-outs both mechanically and electrically activated http://www.jegs.com/c/Exhaust-Headers-Mufflers_Exhaust-Cutouts/11529/1000= 2/-1 Ed From: Mark Steitle=20 Sent: Wednesday, November 24, 2010 11:51 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Friends and Family.... Chris,=20 Well, you can always go out to the airport and polish your turbo while = you wait for your EC-2 to arrive. ;-) If weather permits (and I get caught up on the "honey-do's") I may = venture down your way this weekend. But before I fly again, I've got to = get the EGT's hooked up after changing exhaust system. No need for me = to call, you'll be able to hear me doing my runup at 50R. That will = give you about a 45 minute warning. Are you planning to be at the = airport Saturday or Sunday? =20 Seriously, I'll call you in advance. How do I find your hangar once on = the ground? From the YouTube videos, it appears that you've got more = hangers at Ellington than Col. Sanders has chicken coops. I'll need a = road map to find your hangar. Mark =20 On Wed, Nov 24, 2010 at 10:29 AM, Chris Barber = wrote: FINE, I guess it is obvious that a holiday that focuses on friends and = family is more important than tending to your aviation project and = posting your progress, discoveries and insight here. NO PROBLEM. We = see where your loyalties lie and it is certainly NOT helping satisfy my = 'fix" of rotary knowledge, otherwise the silence would not be as = deafening as an un-muffled 20b at full song. Go ahead, eat your turkey, watch the Cowboys get beat, fall asleep = with that evening cocktail dangling from your hand. I can wait....... = I will be thinking of you all as I "serve and protect" while other = officers, as well as all of you, enjoy the day with their families. I = will be checking the list with disappointment as no new emails get = posted. Heavy sigh. Oh, and Happy Thanksgiving. ;-) Chris Barber Houston ------=_NextPart_000_0025_01CB8BD9.14278710 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Hi Mark, Chris and the rest - Happy = Thanksgiving -=20 except for scrooge Chris of course {:>)
 
Mark, been thinking about your exhaust conundrum = - clearly=20 the least exhaust back pressure is best for performance out of your PP - = however, as you have indicated the Wail of an unmuffered 20B PP=20 port might  force you to get towed to 10,000 MSL =  before=20 turning on the engine to comply with noise abatement rules.  Not a = very=20 viable solution.
 
Got me to thinking about a similar problem back = in the Hot=20 rod days.  The solution was the "cut-out" - simply a valve in the = exhaust=20 system that diverted the exhaust through the muffler when the sound = police were=20 in near vicinity - and then when all was safe (like Chris not being = around=20 {:>)), the valve was switched to divert the exhaust down a straight=20 pipe.
 
I'm wonder whether that might not be a viable = solution to=20 having your cake and eating it also?  For most of us running stock = or mild=20 street ports - its probably not worth the effort, but in you case it = might=20 be. 
 
Here is a URL to cut-outs both mechanically and=20 electrically activated
 
http://www.jegs.com/c/Exhaust-Headers-Mufflers_Exhaust-Cuto= uts/11529/10002/-1
 
 
Ed

Sent: Wednesday, November 24, 2010 11:51 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: Friends and = Family....

Chris,
 
Well, you can always go out to the airport and polish your turbo = while you=20 wait for your EC-2 to arrive.  ;-)
 
If weather permits (and I get caught up on the "honey-do's") I may = venture=20 down your way this weekend.  But before I fly again, I've got to = get the=20 EGT's hooked up after changing exhaust system.  No need for me = to=20 call, you'll be able to hear me doing my runup at 50R.  That = will give=20 you about a 45 minute warning.  Are you planning to be at the = airport=20 Saturday or Sunday?  
 
Seriously, I'll call you in advance.  How do I find your = hangar once=20 on the ground?  From the YouTube videos, it appears that you've got = more=20 hangers at Ellington than Col. Sanders has chicken coops.  I'll = need a road=20 map to find your hangar.
 
Mark
 
   

On Wed, Nov 24, 2010 at 10:29 AM, Chris Barber = <cbarber@texasattorney.net&g= t;=20 wrote:
FINE, I guess it is obvious that a holiday that focuses on = friends and=20 family is more important than tending to your aviation project and = posting=20 your progress, discoveries and insight here.  NO = PROBLEM.  We=20 see where your loyalties lie and it is certainly NOT = helping=20 satisfy my 'fix" of rotary knowledge, otherwise the silence would not = be=20 as deafening as=20 an un-muffled 20b at full = song.
 
Go ahead, eat your turkey, watch the Cowboys get beat, fall = asleep with=20 that evening cocktail dangling from your hand.  I can = wait.......  I=20 will be thinking of you all as I "serve and protect" while other = officers, as=20 well as all of you, enjoy the day with their families.  I = will be=20 checking the list with disappointment as no new emails get = posted.  Heavy sigh.
 
 
Oh, and Happy Thanksgiving. ;-)
 
Chris Barber
=
Houston

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