X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost03.isp.att.net ([204.127.217.103] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4591129 for flyrotary@lancaironline.net; Wed, 24 Nov 2010 15:19:34 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.217.103; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-148-241.mco.bellsouth.net[98.85.148.241]) by isp.att.net (frfwmhc03) with SMTP id <20101124201856H03002tkkee>; Wed, 24 Nov 2010 20:18:56 +0000 X-Originating-IP: [98.85.148.241] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Exhaust Cut-out was [FlyRotary] Re: Friendsand Family.... Date: Wed, 24 Nov 2010 15:18:59 -0500 Message-ID: <2B595295FC6740A8AED74C59F78AD8C6@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CB8BEA.EBACF560" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcuMDEXgZRzblZhMRIemjIt61VqKlgACF2FA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CB8BEA.EBACF560 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Chris, You need to get a knob in your hangar. the heck with the turbo! :>) Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber Sent: Wednesday, November 24, 2010 2:15 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Exhaust Cut-out was [FlyRotary] Re: Friendsand Family.... Yeah Mark, a turbo....something to polish on those lonely nights. Remember, you can always ask a friend to help. ok, enough Chris, you are being sophomoric. DUH! ;-) _____ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Mark Steitle [msteitle@gmail.com] Sent: Wednesday, November 24, 2010 1:09 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Exhaust Cut-out was [FlyRotary] Re: Friendsand Family.... Ed, You ought to be ashamed to even suggest such a thing! I would have thought that an EE would come up with a more elaborate "electronic" solution, such as a noise amplitude attenuation/cancellation/suppression system (NAACS), sort of like a giant ANR headset that fits over the tailpipe. The whole system would consist of one IC and a big speaker. You could spend the next ten years developing it for TSO market. http://www.thedetroitbureau.com/2010/05/bmw-diesel-shows-electronic-noise-ca ncellation/ On second thought, a cutout would be a great solution, except that it kills power where you need it the most. I may have to add a turbo-charger just to quiet the savage beast! Mark On Wed, Nov 24, 2010 at 12:11 PM, Ed Anderson wrote: 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. Here is a URL to cut-outs both mechanically and electrically activated http://www.jegs.com/c/Exhaust-Headers-Mufflers_Exhaust-Cutouts/11529/10002/- 1 Ed From: Mark Steitle 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 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? 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 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_000F_01CB8BEA.EBACF560 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chris,

You need to get a knob in your = hangar… the heck with the turbo!  :>)

 

Bill B

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris = Barber
Sent: Wednesday, November = 24, 2010 2:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Exhaust Cut-out was [FlyRotary] Re: Friendsand = Family....

 

Yeah Mark, a turbo....something = to polish on those lonely nights.  Remember, you can always ask a = friend to help.

 

ok, enough Chris, you are being sophomoric.    DUH!

 

;-)

 

 

From: = Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Mark Steitle [msteitle@gmail.com]
Sent: Wednesday, November = 24, 2010 1:09 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Exhaust Cut-out was [FlyRotary] Re: Friendsand Family....

Ed,

 

You ought to be ashamed to even = suggest such a thing!  I would have thought that an EE would come up = with a more elaborate "electronic" solution, such as a noise amplitude attenuation/cancellation/suppression system (NAACS), = sort of like a giant ANR headset that fits over the tailpipe.  The = whole system would consist of one IC and a big speaker.  You could spend = the next ten years developing it for TSO = market.

 

On second thought, a cutout would = be a great solution, except that it kills power where you need it the = most.  I may have to add a turbo-charger just to quiet the savage = beast!

 

Mark

On Wed, Nov 24, 2010 at 12:11 PM, = Ed Anderson <eanderson@carolina.rr.com> wrote:

 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. 

 

Here is a URL to cut-outs both mechanically and electrically activated

 

 

 

Ed

 

From: Mark Steitle

Sent: Wednesday, = November 24, 2010 11:51 AM

Subject: [FlyRotary] Re: Friends and Family....

 

Chris, =

 

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?  

 

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

 

   

On Wed, Nov 24, 2010 at 10:29 AM, = Chris Barber <cbarber@texasattorney.net> 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

 

 

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