X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost06.isp.att.net ([204.127.217.106] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2642803 for flyrotary@lancaironline.net; Sat, 12 Jan 2008 22:36:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=204.127.217.106; envelope-from=bbradburry@bellsouth.net Received: from arptk8ng400 (adsl-146-123-131.mco.bellsouth.net[72.146.123.131]) by isp.att.net (frfwmhc06) with SMTP id <20080113033556H0600co9vue>; Sun, 13 Jan 2008 03:35:56 +0000 X-Originating-IP: [72.146.123.131] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: URL for HushPower Date: Sat, 12 Jan 2008 22:35:55 -0500 Message-ID: <808F12603A664439B173344197CD97DE@ARPTK8NG400> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C8556B.7F5BE690" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AchViPoasKgVQVWVRBKh5XAlL7OoHwAC/4Uw X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16545 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C8556B.7F5BE690 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Mark, How do the threads look on the O2 sensor? Mine were boogered up when I removed it. I still don't know if it is due to different threads or something else. I used the bung from the original exhaust manifold, but the O2 sensor that Tracy recommends. Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Saturday, January 12, 2008 9:06 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: URL for HushPower Bill, The cowl has had the "Dolly Pardon" mod. So, no further cowl modifications should be necessary. Hopefully, this exhaust system will last. I found one crack that I hope was caused by not having a support out near the rear. The HP-2 will be supported for sure. I haven't installed the bung for the O2 sensor yet, plan to do that tomorrow. I need to pick up a new O2 sensor as mine somehow got damaged. Mark S. On Jan 12, 2008 7:02 PM, Bill Bradburry wrote: Took me a minute to figure out what I was looking at, Mark, but what are you going to do to reinstall the O2 sensor? Looks like you will have to do a little cowl mod as well? I sure wish I lived a little closer to your welder. :>) That is a very clean looking install. Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Saturday, January 12, 2008 5:59 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: URL for HushPower For rotorheads that are contemplating using (also the mildly curious) the Flowmaster HP-2 "resonator" muffler, I installed the HP-2 today on my 20B and was able to do a run-up. Bobby Hughes and I both agree that the exhaust tone is much, much mellower with a deeper tone. My Lighspeed ANR headset had no problem cancelling out this low-frequency exhaust tone. While the overall sound level was still pretty significant, the exhaust tone was much more pleasant to the ears. The ear-piercing, glass shattering, nails-on-the-chalkboard, make-you-bleed-from-the-ears, exhaust tone is totally tamed. The 3-blade M/T prop is the primary noisemaker now. The test took place between two rows of hangars, so I feel that DB readings are not very realistic. I'll take those again out on the ramp and post the numbers. If the HP-2 holds up to the pounding of the rotary's exhaust, I'll be a very happy camper. Mark S. On Jan 12, 2008 3:22 PM, Ed Anderson wrote: They are both used stock Rx-7 turbos. one is the older model pre 89 and the second is a later model 91 year. They both appear to be in working condition in no nicks on the blades and they spin. I used compressed air to spin the compressor wheels to they were really whizzing along. One came with my 91 turbo block and the other was given to me. Ed ----- Original Message ----- From: Thomas Jakits To: Rotary motors in aircraft Sent: Saturday, January 12, 2008 3:46 PM Subject: [FlyRotary] Re: URL for HushPower Well, then we just have to keep on looking for a "justification" for you/your area/etc. :) Just wait, I'll find something! :) Thomas How about: "..... I have two turbo sitting in my shop......." ...are they new/used? What's the scoop on them? ------=_NextPart_000_0011_01C8556B.7F5BE690 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Mark,

 

How do the threads look on the O2 sensor?  Mine were = boogered up when I removed it.  I still don’t know if it is due to = different threads or something else.  I used the bung from the original = exhaust manifold, but the O2 sensor that Tracy recommends.

 

Bill B 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Saturday, January = 12, 2008 9:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = URL for HushPower

Bill,
The cowl has had the "Dolly Pardon" mod.  So, no further = cowl modifications should be necessary.  Hopefully, this exhaust system = will last.  I found one crack that I hope was caused by not having a = support out near the rear.  The HP-2 will be supported for sure.  I = haven't installed the bung for the O2 sensor yet, plan to do that = tomorrow.  I need to pick up a new O2 sensor as mine somehow got damaged. 

Mark S.

On Jan 12, 2008 7:02 PM, Bill Bradburry <bbradburry@bellsouth.net>= wrote:

Took me a minute to figure out what I was looking at, Mark, but what are you going = to do to reinstall the O2 sensor?  Looks like you will have to do a = little cowl mod as well?

 

I sure wish I lived a little closer to your welder…  :>)  = That is a very clean looking install.

 

Bill B 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark = Steitle
Sent: Saturday, January = 12, 2008 5:59 PM


To: Rotary motors in aircraft

Subject: = [FlyRotary] Re: URL for HushPower

For rotorheads that are contemplating using = (also the mildly curious) the Flowmaster HP-2 "resonator" muffler,

I installed the HP-2 today on my 20B and was able to do a run-up.  = Bobby Hughes and I both agree that the exhaust tone is much, much mellower = with a deeper tone.  My Lighspeed ANR headset had no problem cancelling = out this low-frequency exhaust tone.  While the overall sound level was = still pretty significant, the exhaust tone was much more pleasant to the = ears.  The ear-piercing, glass shattering, nails-on-the-chalkboard, make-you-bleed-from-the-ears, exhaust tone is totally tamed.  The = 3-blade M/T prop is the primary noisemaker now.  The test took place = between two rows of hangars, so I feel that DB readings are not very = realistic.  I'll take those again out on the ramp and post the numbers.  If the HP-2 = holds up to the pounding of the rotary's exhaust, I'll be a very happy camper. =

Mark S.

On Jan 12, 2008 3:22 PM, Ed Anderson <eanderson@carolina.rr.com> = wrote:

They are both used stock Rx-7 turbos.  one is the older model pre = 89  and the second is a later model 91 year.  They both appear to be in = working condition in no nicks on the blades and they spin.  I used compressed air to = spin the compressor wheels to they were really whizzing = along.

 

One came with my 91 turbo block and the other was given to me. =

 

Ed

 

 

----- Original Message -----

From: Thomas Jakits =

Sent: Saturday, January 12, 2008 = 3:46 PM

Subject: [FlyRotary] Re: URL for = HushPower

 

Well,

then we just have to keep on looking for a "justification" for you/your area/etc. :)

Just wait, I'll find something! :)

Thomas

How about: "..... I have two turbo sitting in my shop......." 

...are they new/used? What's the scoop on = them?

 

 

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