X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-lpp01m010-f52.google.com ([209.85.215.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5545540 for flyrotary@lancaironline.net; Wed, 16 May 2012 13:02:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.52; envelope-from=rwstracy@gmail.com Received: by lahj13 with SMTP id j13so626226lah.25 for ; Wed, 16 May 2012 10:02:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=7wwYRUhEXVaLVHQXeX8/RNOMBA5I24+7tSs7iHbvfnE=; b=s/2eRphJpvm5Na4jwkCbew/JD6iaJWHIqUdZhB78y2mTqVFEp8tRRD4o1SSKgPU9d6 O5M0FzwDu87llfv6XSX9NYLKeWCNdRO6YhKJ8WEdcnD04N979SKM09xG67DeWF0Ilu6p QS3/TMWRWUQChcjtnXbO9TbcS/x7v2H61l51MedtumhjmBWclwd3hker2OuwsvUDzsoZ h01k1OjXc0rTXxSrZDlgZ+F7JY6l07rXOui/9v65yHTbTPWzBUWUQmiJqaxLXieNKNZL ++EVF+c3g+Ail+6/6AjvldzQGWLUCw9EE0pB6RnzYeRQHcJXRA3zFdRPA4zQWtNyKzMo TuCA== MIME-Version: 1.0 Received: by 10.112.103.194 with SMTP id fy2mr1620590lbb.64.1337187737605; Wed, 16 May 2012 10:02:17 -0700 (PDT) Received: by 10.112.8.167 with HTTP; Wed, 16 May 2012 10:02:17 -0700 (PDT) In-Reply-To: References: Date: Wed, 16 May 2012 13:02:17 -0400 Message-ID: Subject: Re: [FlyRotary] Re: High EGTs From: Tracy To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=f46d040169af19178f04c02a4803 --f46d040169af19178f04c02a4803 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On Wed, May 16, 2012 at 8:36 AM, Thomas Giddings wrot= e: Soooo...what are those numbers?:) KIND REGARDS Thomas Giddings After recently getting the Fuel Flow well calibrated I don't have the full list but the RV-8 will maintain level flight at sea level anywhere between 3.3 and 30 GPH. At Vne of 230 mph the 20B is sucking down 24 GPH. Things look much better at cruising altitude (15 - 18,000 ft). Tracy > > > On May 16, 2012, at 8:28 AM, Tracy wrote: > > I'm still mystified by the widely different results builders are getting > with the Hushpower. Both my planes have them. I have over 500 hours on > the RV-4 muffler and it's still in good shape (minus the fiberglass which > goes pretty fast). Even the Hushpower on the 20B is still OK after 90 > hours. Admittedly, i do spend a lot of time cruising around at low > throttle but every takeoff & climb out is at WOT. > > Only news on the 20B testing is that I found my fuel flow calibration was > off so it wasn't getting as good a fuel burn numbers as I thought. Still > in the same ball park as the Renesis at similar airspeeds. At sea level = it > gets pretty hungry above 215 mph though. There the numbers look like wha= t > you would expect of a Lyc. IO - 540. > > Tracy > > Sent from my iPad > > On May 16, 2012, at 8:03 AM, "Ed Anderson" > wrote: > > Hi Brian, > > I have flown with two Hushpower mufflers for the past 8 years. So far no > restrictions, although the non-metallic sound deadener has long departed. > Also by having one muffler per exhaust, it may suffer less of a beating. > > YMMV > > Ed > > Edward L. Anderson > Anderson Electronic Enterprises LLC > 305 Reefton Road > Weddington, NC 28104 > http://www.andersonee.com > http://www.eicommander.com > > *From:* bktrub@aol.com > *Sent:* Wednesday, May 16, 2012 12:25 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: High EGTs > > And I am running a Hushpower, I run a bore scope up it today and the exit > cone looked completely intact. No way to check out the entrance cone > without taking the exhuast system apart, which is possible but a PITA. I= s > a Hushpower considered restrictive? > > Brian Trubee > > > -----Original Message----- > From: Bill Bradburry < bbradburry@bellsouth.net= > > To: Rotary motors in aircraft > Sent: Tue, May 15, 2012 8:38 pm > Subject: [FlyRotary] Re: High EGTs > > Mark, > Now you have gotten me concerned! I changed the muffler and that didn=92= t > seem to have any effect on the EGTs, so I don=92t think that is the cause= , > but I don=92t want to damage any orings. What were the temps you were se= eing > when the orings were damaged? > > Bill > > ------------------------------ > *From:* Rotary motors in aircraft [ > mailto:flyrotary@lancaironline.net ] *On > Behalf Of *Mark Steitle > *Sent:* Tuesday, May 15, 2012 10:18 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: High EGTs > > Brian, > > I had high EGT's at one time. Turns out it was due to an overly > restrictive muffler. The high EGT's damaged the o-rings resulting in an > engine overhaul. Could this possibly be at the root of your high EGT > readings? > > Mark S. > On Tue, May 15, 2012 at 8:51 PM, < bktrub@aol.com> wrote= : > My engine is now running just the way it should, temps were 180 or lower > on a 75 degree day, but my EGTs have always been high, really high- above > 1800 almost all the time. I think it may be a calibration issue. My egt > sensors are about 3 inches downstream of the exhaust ports, and I am usin= g > Tracy's EM2, calibrated at the stock settings. When the engine is stone > cold, the egt's read about 230 degrees, which I assume is normal because > the sensors are meant to operate at a much higher temperature. Any though= ts? > > Brian Trubee > > > > --f46d040169af19178f04c02a4803 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On Wed, May 16, 2012 at 8:36 AM, Thomas Giddings <n360tg@earthlink.net<= /a>> wrote:

Soooo...what are those numbers?:)
KIND REGARDS
Thoma= s Giddings


After recently getting the Fue= l Flow well calibrated I don't have the full list but the RV-8 will mai= ntain level flight at sea level anywhere between 3.3 and 30 GPH.=A0 At Vne = of 230 mph the 20B is sucking down 24 GPH.=A0 Things look much better at cr= uising altitude (15 - 18,000 ft).

Tracy





On May 16, 2012, at 8:28 AM, Tracy wrote:

I'm still mystified by th= e widely different results builders are getting with the Hushpower. =A0Both= my planes have them. =A0I have over 500 hours on the RV-4 muffler and it&#= 39;s still in good shape (minus the fiberglass which goes pretty fast). Eve= n the Hushpower on the 20B is still OK after 90 hours. =A0 Admittedly, i do= spend a lot of time cruising around at low throttle but every takeoff &= ; climb out is at WOT.=A0

Only news on the 20B testing is that I found my fuel fl= ow calibration was off so it wasn't getting as good a fuel burn numbers= as I thought. =A0Still in the same ball park as the Renesis at similar air= speeds. =A0At sea level it gets pretty hungry above 215 mph though. =A0Ther= e the numbers look like what you would expect of a Lyc. IO - 540. =A0

Tracy

Sent from my iPad
Hi Brian,
=A0
I have flown with two Hushpower mufflers for the = past 8=20 years.=A0 So far no restrictions, although the non-metallic sound deadener= =20 has long departed.=A0 Also by having one muffler per exhaust, it may suffer= =20 less of a beating.
=A0
YMMV
=A0
Ed
=A0


And I am running a Hushpower, I run a bore scope up it today and the e= xit=20 cone looked completely intact. No way to check out the entrance cone withou= t=20 taking the exhuast=A0 system apart, which is possible but a PITA. Is a=20 Hushpower considered restrictive?
=A0
Brian Trubee


-----Original=20 Message-----
From: Bill Bradburry <bbradburry@bellsouth.net>
To:=20 Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, May= =20 15, 2012 8:38 pm
Subject: [FlyRotary] Re: High EGTs

Mark,
Now you have gotten me=20 concerned!=A0 I changed the muffler and that didn=92t seem to have any effe= ct=20 on the EGTs, so I don=92t think that is the cause, but I don=92t want to da= mage any=20 orings.=A0 What were the temps you were seeing when the orings were=20 damaged?
=A0
Bill
=A0
From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net]=20 On Behalf Of Mark=20 Steitle
Sent: Tuesday, Ma= y 15,=20 2012 10:18 PM
To: Rotary = motors=20 in aircraft
Subject:=20 [FlyRotary] Re: High EGTs
=A0
Brian,=A0
=A0
I had high EGT's at one time. =A0Turns out it wa= s due=20 to an overly restrictive muffler. =A0The high EGT's damaged the o-rings= =20 resulting in an engine overhaul. =A0Could this possibly be at the root of= =20 your high EGT readings?
=A0
Mark S.
On Tue, May 15, 2012 at 8:51 PM, <bktrub@aol.com> wrote:
My engine is now=20 running just the way it should, temps were 180 or lower on a 75 degree day,= but=20 my EGTs have always been high, really high- above 1800 almost all the time.= I=20 think it may be a calibration issue. My egt sensors are about 3 inches=20 downstream of the exhaust ports, and I am using Tracy's EM2, calibrated= at the=20 stock settings. When the engine is stone cold, the egt's read about 230= degrees,=20 which I assume is normal because the sensors are meant to operate at a much= =20 higher temperature. Any thoughts?
=A0
Brian=20 Trubee
=A0


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