X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta05.emeryville.ca.mail.comcast.net ([76.96.30.48] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTP id 6438094 for flyrotary@lancaironline.net; Thu, 22 Aug 2013 18:38:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.48; envelope-from=hoursaway1@comcast.net Received: from omta24.emeryville.ca.mail.comcast.net ([76.96.30.92]) by qmta05.emeryville.ca.mail.comcast.net with comcast id FyPq1m0031zF43QA5ydj0B; Thu, 22 Aug 2013 22:37:43 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.40.137]) by omta24.emeryville.ca.mail.comcast.net with comcast id Fydi1m00s2xZMJ48kydiH4; Thu, 22 Aug 2013 22:37:42 +0000 Date: Thu, 22 Aug 2013 22:37:42 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <888418475.2488670.1377211062894.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Fuel map scrambled. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2488669_542961054.1377211062893" X-Originating-IP: [::ffff:68.40.10.159] X-Mailer: Zimbra 6.0.13_GA_2944 (ZimbraWebClient - FF3.0 (Win)/6.0.13_GA_2944) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1377211063; bh=nmgvYD9uQIg+K0kNKqgkllT0v9RjjhBej9160L6NnPQ=; h=Received:Received:Date:From:To:Message-ID:Subject:MIME-Version: Content-Type; b=hqB20oCfS9xvcJ4REL9qBY/v/+0pZ6qJvoMf2fBx4sEIKFtDdiKE6dCCNvaKgbIPv a/O+/rAhVz5FZfKcEppJbxj9naWlg3QXVEhpRzCyH3Cqnc68AjcD6iuFZLlbvwqwUI U9/zgCaFFIVT8nQJ4516MhUIIOfCOyRY7VWOzhLj2UOFhYj3KASMyZeH7O1L5OUYr6 cudV8n5o0VvYHab1h8dqkJf4t8VXI8luaURZAwEak+jYwCB8lBNCdiFQQLMmyTLyFS dcJubgEmcjFvCUqSr+BrCRJrXIKrs7UDprgA4P3W6VK/I8jKx6oGvoqXy6iV6p4a4x YjB/ER6QPB5xg== ------=_Part_2488669_542961054.1377211062893 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Thanks Mark, I have the diodes at the sol. both start & master. From readin= g yours & other posts I would have to say V-spike is the problem cause, aft= er thinking about anything diff. from 10 hrs. of air time prev. I came up w= ith the landing & taxi lights were on this last flight. Now, I did not swit= ch them on in the air, I switched them on when still on the ground with apr= ox. 22 min. running on the ground then flew for aprox. 15 min. before fuel = map corruption. Will look into the routing of circuits for both lights. Dav= id=20 ----- Original Message ----- From: "Mark Steitle" =20 To: "Rotary motors in aircraft" =20 Sent: Thursday, August 22, 2013 6:00:11 AM=20 Subject: [FlyRotary] Re: Fuel map scrambled.=20 David,=20 I chased a similar problem on my 3-rotor back when it was barely out of ini= tial flight testing. Tried a lot of things, but nothing seemed to fix the r= andom re-set of the EC-2 MAP table. Someplace I heard about voltage spikes = originating from the starter solenoid. I installed a large diode across the= "+" terminal of the starter solenoid and haven't had a problem since. The = culprit may be different with your a/c, but I would be very suspicious of a= nything that could generate voltage spikes. Also, check all of your grounds= thoroughly.=20 Good Luck,=20 Mark S.=20 P.S. The first thing Tracy always asks is, "Did you try the B-controller?" = How does the B-controller MAP look?=20 On Wed, Aug 21, 2013 at 9:09 PM, < hoursaway1@comcast.net > wrote:=20 1st..... am now on the ground safe & sound, no damage normal landing. The s= tory goes....... Level at 2500' above Mason Jewett Field, ( hazy evening, a= prox. 7:30 pm ) on the down wind abeam of the end of the runway, 4600 rpm, = ? MAP, 125 MPH ind., 3rd circle around the patch getting ready to put in fu= ll cruise pitch on prop to do a full throttle numbers gathering. Then the e= ng. started running very poorly, missing, stumbling hard, destict loss of p= ower, tryed to descend & come around to land but am high & hot with ( RV's = need air brakes ) eng. smoothed out, chose a sweet spot & climbed out to go= around,,, low but climbing, ran smooth 4000 rpm, landed ok. Before shutdow= n, checked fuel map bars for EC2 on EM2, some in the middle some at the bot= tom,,,Lean,,, why did the fuel map scramble suddenly, steady cruise flight,= made no changes at that time? At the airport by 6:30, pull plane from hang= er to do two tests tonight, 1st. run eng. at low power/idle like sitting in= line for takeoff from Osh or ?, how long can we stay running without getti= ng to hot, 18 min. coolant 205 F, oil 175 F, ok that's good enough for me l= ets go fly & do the prop full cruise pitch test run. That was the start of = the evening, ended differently than I would have liked. But nothing bent. D= id not reset EC2 yet, am going to start eng. & check to see if computer B r= uns ok, did not get a chance to throw that switch, when I found the sweet s= pot I changed nothing, just came around & landed. What is the fix for this = anomaly?? David R Cook RV6A Rotary=20 ------=_Part_2488669_542961054.1377211062893 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <= div style=3D'font-family: Arial; font-size: 12pt; color: #000000'>Thanks Ma= rk, I have the diodes at the sol. both start & master.  From readi= ng yours & other posts I would have to say V-spike is the problem cause= , after thinking about anything diff. from 10 hrs. of air time prev. I came= up with the landing & taxi lights were on this last flight. Now, = I did not switch them on in the air,  I switched them on when still o= n the ground with aprox. 22 min. running on the ground then flew for aprox.= 15 min. before fuel map corruption.  Will look into the routing of ci= rcuits for both lights.  David

From: "M= ark Steitle" <msteitle@gmail.com>
To: "Rotary motors in air= craft" <flyrotary@lancaironline.net>
Sent: Thursday, August= 22, 2013 6:00:11 AM
Subject: [FlyRotary] Re: Fuel map scrambled.=

David, 

I chased a similar= problem on my 3-rotor back when it was barely out of initial flight testin= g.  Tried a lot of things, but nothing seemed to fix the random re-set= of the EC-2 MAP table.  Someplace I heard about voltage spikes origin= ating from the starter solenoid.  I installed a large diode across the= "+" terminal of the starter solenoid and haven't had a problem since. &nbs= p;The culprit may be different with your a/c, but I would be very suspiciou= s of anything that could generate voltage spikes.  Also, check all of = your grounds thoroughly.  

Good Luck,  

Mark S.

P.S.  The first thing Tracy always asks is, "Did = you try the B-controller?"  How does the B-controller MAP look?
<= /div>


On Wed, Aug 2= 1, 2013 at 9:09 PM, <hoursaway1@comcast.net> wrote:
1st..... am now on the= ground safe & sound, no damage normal landing.    The story = goes....... Level at 2500' above Mason Jewett Field,  (  hazy eve= ning, aprox. 7:30 pm  )  on the down wind abeam of the end of the= runway,   4600 rpm,  ? MAP,  125 MPH  ind.,  3rd = circle around the patch getting ready to put in full cruise pitch on prop t= o do a full throttle numbers gathering.  Then the eng. started running= very poorly,  missing, stumbling hard, destict loss of power,  t= ryed to descend & come around  to land but am high & hot with&= nbsp; (  RV's need air brakes )  eng. smoothed out, chose a sweet= spot & climbed out to go around,,, low  but climbing,  ran s= mooth 4000 rpm,  landed ok.  Before shutdown,  checked fuel = map bars for EC2  on EM2,  some in the middle some at the bottom,= ,,Lean,,, why did the fuel map scramble suddenly,  steady cruise fligh= t, made no changes at that time?  At the airport by 6:30,  pull p= lane from hanger to do two tests tonight, 1st. run eng. at low power/idle l= ike sitting in line for takeoff from Osh or ?,  how long can we stay r= unning without getting to hot, 18 min. coolant 205 F,  oil 175 F, = ; ok that's good enough for me lets go fly & do the prop full cruise pi= tch test run.  That was the start of the evening, ended differently th= an I would have liked.  But nothing bent.   Did not reset EC2&nbs= p; yet, am going to start eng. & check to see if computer B runs ok, di= d not get a chance to throw that switch, when I found the sweet spot I chan= ged nothing, just came around & landed.  What is the fix for this = anomaly??            = ;        David R Cook  RV6A  R= otary

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