X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-ma01.mx.aol.com ([64.12.206.39] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4892332 for flyrotary@lancaironline.net; Sat, 05 Mar 2011 20:24:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.206.39; envelope-from=Bktrub@aol.com Received: from imo-da03.mx.aol.com (imo-da03.mx.aol.com [205.188.169.201]) by imr-ma01.mx.aol.com (8.14.1/8.14.1) with ESMTP id p261NUHv020435 for ; Sat, 5 Mar 2011 20:23:30 -0500 Received: from Bktrub@aol.com by imo-da03.mx.aol.com (mail_out_v42.9.) id q.103b.f370ef (55713) for ; Sat, 5 Mar 2011 20:23:25 -0500 (EST) Received: from smtprly-mc02.mx.aol.com (smtprly-mc02.mx.aol.com [64.12.95.98]) by cia-md01.mx.aol.com (v129.9) with ESMTP id MAILCIAMD014-d3d14d72e20dd3; Sat, 05 Mar 2011 20:23:25 -0500 Received: from webmail-m145 (webmail-m145.sim.aol.com [149.174.9.29]) by smtprly-mc02.mx.aol.com (v129.9) with ESMTP id MAILSMTPRLYMC023-d3d14d72e20dd3; Sat, 05 Mar 2011 20:23:25 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: Miss above staging point. Date: Sat, 05 Mar 2011 20:23:24 -0500 X-AOL-IP: 50.46.150.65 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: bktrub@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CDA9B4394A9D8E_15D8_1F8ED_webmail-m145.sysops.aol.com" X-Mailer: AOL Webmail 33356-STANDARD Received: from 50.46.150.65 by webmail-m145.sysops.aol.com (149.174.9.29) with HTTP (WebMailUI); Sat, 05 Mar 2011 20:23:24 -0500 Message-Id: <8CDA9B43943796E-15D8-EDA9@webmail-m145.sysops.aol.com> X-Spam-Flag:NO X-AOL-SENDER: Bktrub@aol.com ----------MB_8CDA9B4394A9D8E_15D8_1F8ED_webmail-m145.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="us-ascii" I'm getting pretty much the same thing, I was out today doing some ground= running and specifically was looking at EGTs. Running above the staging= point, I'm getting EGTs that are very close to each other, within 30 degr= ees, but I am seeing that rotor one EGT temps bounce around quite a bit,= like 20-30 degrees in a time frame of a second. I believe that it is a= sensor or wiring error of some sort. The #2 rotor EGT stays pretty consis= tent. At near full throttle settings I am getting some missing, not so muc= h on the ground, it's more pronounced in the air. I'll do some more checki= ng on it in flight. The last time I flew, the tower called and said they= had calls from the town that I was flying over at 5,500 AGL from people= who said there was a plane in distress with engine trouble.=20 So, my EGTs are very close up and down the powerband and through the stagi= ng point, maybe there is a spark related issue up at high RPMs. More testi= ng in a few days. Brian Trubee -----Original Message----- From: Tracy To: Rotary motors in aircraft Sent: Sat, Mar 5, 2011 5:10 pm Subject: [FlyRotary] Re: Miss above staging point. Use those instruments! What happens to the EGTs when passing through th= e staging point? Data is better than guessing. Tracy On Sat, Mar 5, 2011 at 5:56 PM, Bill Bradburry = wrote: I have developed a miss above the staging point. The fuel pressure seems= ok, the mixture also seems ok. I am at a loss. =20 To try and troubleshoot, I am considering getting above the staging point= and disabling the primaries and secondaries to see if I can identify whic= h is the cause. Since it runs ok below the stage, I assume it is not the= primaries. =20 I recently changed my fuel filters and installed a large canister filter.= There seems a possibility that I introduced some contamination that clo= gged an injector. Other wise it seems it must be spark related. This jus= t happened one flight ago. The engine was running fine, till that last ta= keoff. It was missing and would only get about 6300 rpm. After take off,= I turned the prop back and slowed the engine down to below that number an= d it smoothed out and ran fine the res of the flight. Today while taxiing= around, I noticed that the miss was back. =20 Opinions welcomed. =20 Bill B =20 =20 ----------MB_8CDA9B4394A9D8E_15D8_1F8ED_webmail-m145.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="us-ascii"
I'm getting pretty much= the same thing, I was out today doing some ground running and specificall= y was looking at EGTs. Running above the staging point, I'm getting EGTs= that are very close to each other, within 30 degrees, but I am seeing tha= t rotor one EGT temps bounce around quite a bit, like 20-30 degrees in&nbs= p; a time frame of a second. I believe that it is a sensor or wiring error= of some sort. The #2 rotor EGT stays pretty consistent. At near full thro= ttle settings I am getting some missing, not so much on the ground, it's= more pronounced in the air. I'll do some more checking on it in flight.= The last time I flew, the tower called and said they had calls from the= town that I was flying over at 5,500 AGL from people who said there was= a plane in distress with engine trouble.
So, my EGTs are very close up and down the powerband and through the= staging point, maybe there is a spark related issue up at high RPMs. More= testing in a few days.
 
Brian Trubee


-----Original Message-----
From: Tracy <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sat, Mar 5, 2011 5:10 pm
Subject: [FlyRotary] Re: Miss above staging point.

Use those inst= ruments!    What happens to the EGTs when passing through the st= aging point?   Data is better than guessing.

Tracy

On Sat, Mar 5, 2011 at 5:56 PM, Bill Bradburry <bbradburry@b= ellsouth.net> wrote:
I have developed a= miss above the staging point.  The fuel pressure seems ok, the mixtu= re also seems ok.  I am at a loss.
 
To try and troubles= hoot, I am considering getting above the staging point and disabling the= primaries and secondaries to see if I can identify which is the cause.&nb= sp; Since it runs ok below the stage, I assume it is not the primaries.
 
I recently changed= my fuel filters and installed a large canister filter.  There seems= a possibility  that I introduced some contamination that clogged an= injector.  Other wise it seems it must be spark related.  This= just happened one flight ago.  The engine was running fine, till tha= t last takeoff.  It was missing and would only get about 6300 rpm.&nb= sp; After take off, I turned the prop back and slowed the engine down to= below that number and it smoothed out and ran fine the res of the flight.=   Today while taxiing around, I noticed that the miss was back.
 
Opinions welcomed.<= /SPAN>
 
Bill B
 
 

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