X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-pv0-f180.google.com ([74.125.83.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4222621 for flyrotary@lancaironline.net; Thu, 15 Apr 2010 12:10:39 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.83.180; envelope-from=msteitle@gmail.com Received: by pvc22 with SMTP id 22so951525pvc.25 for ; Thu, 15 Apr 2010 09:10:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:content-type; bh=44Wp6IzOkYxATspPEQ60DcjRZyUnuW25nXdy+LStPQs=; b=mZtTb1egNSSHuuabijmkOU17xf1dhsbQyU3vt1QAz7rZuuObqDqaYmZL3f9jXGht9d QnPKJrVZmetemAtFLaVXk3IvNJh3lmeEl0fRQWDuVoAAXWNWEUuxYIduHpoRP0+ij//a Go/0CPKu/EnQTaZX5C8vEAbF8ApaqWyS966M0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=acf7FHIoZm6Gl5NdS+eTdXojUyKrimXeyxjF0Ry2oY/9b4fBiMdgMgSWOcEe/CseD1 fQGA0m305/dKe4m9Eb/Olq6WPlwpxOMr+f0wN5FAyvLY2SJmW+S555ll5v1jaQKaq8dr mcYNn1X4+SGBy+GNFKPMQjP56cJB+Hz86+RzM= MIME-Version: 1.0 Received: by 10.231.183.195 with HTTP; Thu, 15 Apr 2010 09:10:02 -0700 (PDT) In-Reply-To: References: Date: Thu, 15 Apr 2010 11:10:02 -0500 Received: by 10.114.187.40 with SMTP id k40mr349534waf.30.1271347802398; Thu, 15 Apr 2010 09:10:02 -0700 (PDT) Message-ID: Subject: Re: [FlyRotary] Re: Weird sound during descent From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e64cd67425dfa5048448ba60 --0016e64cd67425dfa5048448ba60 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Jeff, Your muffler may be disintegrating from within. That's what happened to my Hushpower II, but then it was pretty close the the exhaust ports. I would take it off and give it a good shake. At the very least, take a look inside. Mark On Thu, Apr 15, 2010 at 10:35 AM, Jeff Whaley wrote: > Mark, do you care to elaborate? > > Should I be looking for leaks? Or loose, rattling material within? > > I am using the HushPower II =85 Jeff > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Mark Steitle > *Sent:* Thursday, April 15, 2010 11:28 AM > > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Weird sound during descent > > > > Jeff, > > > > From my experience, the first place I would look is at the muffler. > > > > Mark S. > > > > On Thu, Apr 15, 2010 at 10:13 AM, Jeff Whaley > wrote: > > I have been hearing a weird buzzing sound usually detectable on base leg = at > low power settings. It is hard to describe in text but is repeatedly as > zzuuzz, zzuuzz, zzuuzz . > > I thought it was wind noise escaping between the fuselage and gear legs, = as > there are no fairings between the fuselage and top of the cub-style gear. > > Last night it was bit bumpy and during one descent there was a good bump > that lifted me against the seat belts -- the noise stopped. > > Tracy had cautioned me against low power steeps descents, something about > thrust bearing and/or snubber =96 maybe refresh me on that one Tracy? > > However, an approach speed of 500 fpm, 80 mph, 3000 rpm, mp <10=94, is no= t > what I=92d consider steep. > > > > Anyone care to give me a clue as to what I might be hearing? > > If I get a chance to fly this weekend, I=92ll experiment to see if I can > stop/change the noise with speed or attitude adjustments. > > Jeff > > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 5031 (20100415) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > This message, and the documents attached hereto, is intended only for the > addressee and may contain privileged or confidential information. Any > unauthorized disclosure is strictly prohibited. If you have received this > message in error, please notify us immediately so that we may correct our > internal records. Please then delete the original message. Thank you. > > > > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 5031 (20100415) __________ > > > > The message was checked by ESET NOD32 Antivirus. > > > > http://www.eset.com > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 5031 (20100415) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > This message, and the documents attached hereto, is intended only for the > addressee and may contain privileged or confidential information. Any > unauthorized disclosure is strictly prohibited. If you have received this > message in error, please notify us immediately so that we may correct our > internal records. Please then delete the original message. Thank you. > --0016e64cd67425dfa5048448ba60 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Jeff,=A0

Your muffler may be=A0disintegrating=A0from wit= hin. =A0That's what happened to my Hushpower II, but then it was pretty= close the the exhaust ports. =A0I would take it off and give it a good sha= ke. =A0At the very least, take a look inside. =A0

Mark

On Thu, Apr 15, = 2010 at 10:35 AM, Jeff Whaley <jwhaley@datacast.com> wrote:

Mark,= do you care to elaborate?

Shoul= d I be looking for leaks? Or loose, rattling material within?

I am = using the HushPower II =85=A0=A0 Jeff

=A0

From:= Rotary motors in aircraft [mailto:flyrotary@lancair= online.net] On Behalf Of Mark Steitle
Sent: Thursday, April 15, 2010 11:28 AM

=
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Weird sound during descent

=A0

Jeff,

=A0

From my experience, the first place I would look is = at the muffler. =A0

=A0

Mark S.

=A0

On Thu, Apr 15, 2010 at 10:13 AM, Jeff Whaley <jwhaley@datacast.co= m> wrote:

I have been hearing a weird buzzing sound usually de= tectable on base leg at low power settings.=A0 It is hard to describe in te= xt but is repeatedly as zzuuzz, zzuuzz, zzuuzz .

I thought it was wind noise escaping between the fus= elage and gear legs, as there are no fairings between the fuselage and top = of the cub-style gear.

Last night it was bit bumpy and during one descent t= here was a good bump that lifted me against the seat belts -- the noise sto= pped.

Tracy had cautioned me against low power steeps desc= ents, something about thrust bearing and/or snubber =96 maybe refresh me on= that one Tracy?

However, an approach speed of 500 fpm, 80 mph, 3000 = rpm, mp <10=94, is not what I=92d consider steep.

=A0

Anyone care to give me a clue as to what I might be = hearing?

If I get a chance to fly this weekend, I=92ll experi= ment to see if I can stop/change the noise with speed or attitude adjustmen= ts.

Jeff



__________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 5031 (20100415) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
This message, and the documents= attached hereto, is intended only for the addressee and may contain privil= eged or confidential information. Any unauthorized disclosure is strictly p= rohibited. If you have received this message in error, please notify us immediately s= o that we may correct our internal records. Please then delete the original= message. Thank you.

=A0

=A0

__________ Information from ESET NOD32 Antivirus, version of virus signa= ture database 5031 (20100415) __________

=A0

The message was checked by ESET NOD32 Antivirus.

=A0

http://www.eset.com



__________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 5031 (20100415) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
This message, and the docum= ents attached hereto, is intended only for the addressee and may contain pr= ivileged or confidential information. Any unauthorized disclosure is strict= ly prohibited. If you have received this message in error, please notify us immediately so that we may correct our = internal records. Please then delete the original message. Thank you.

--0016e64cd67425dfa5048448ba60--