X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([207.115.11.54] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2642698 for flyrotary@lancaironline.net; Sat, 12 Jan 2008 20:02:58 -0500 Received-SPF: pass receiver=logan.com; client-ip=207.115.11.54; envelope-from=bbradburry@bellsouth.net Received: from arptk8ng400 (adsl-146-123-131.mco.bellsouth.net[72.146.123.131]) by isp.att.net (frfwmhc04) with SMTP id <20080113010217H0400a1dq9e>; Sun, 13 Jan 2008 01:02:17 +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 20:02:16 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0061_01C85556.084EA7A0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AchVbsIG7RR9kLS5RMWHITp3zrYe8QAEK0eg X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16545 This is a multi-part message in MIME format. ------=_NextPart_000_0061_01C85556.084EA7A0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit 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_0061_01C85556.084EA7A0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

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&g= t; 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.

<= /p>

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?

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