X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bk0-f47.google.com ([209.85.214.47] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTPS id 6436989 for flyrotary@lancaironline.net; Thu, 22 Aug 2013 06:00:51 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.47; envelope-from=msteitle@gmail.com Received: by mail-bk0-f47.google.com with SMTP id mx12so583981bkb.6 for ; Thu, 22 Aug 2013 03:00:11 -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=sAnAjSBxF2WxK5jeceyb2gLjz+ATVyes34u0300bG14=; b=RzEod2xYcpPncyDrpLmQesVH1Jo0atXrHOaJYdPJ4nbuU71l5bocRy7NKEdCzdz+a2 Ipe2ohd3e05UvOCiOVJoXER6tr0hjqCpQ+JRYj9mBjE3nwIv8n5TOyhcUIaqHsAeng7x 9HrVuq/NSA3TlEd8AUrN3VRkn+F0Y4e0/sCruyHtb0a8Ai43XFEJTFV2VhTaINXvheOb OQj/10PG+doOOZK82eMOC4gAdrYPt0OvISzDfgKf3Q0BSOHuwaH1IHt+PFpX2PkwhK77 fYbGNmOfskfrZofsNK8cpVK37vIE4dhPRzQ3fRm35x6YhEG2cgFZ3ugS0ZXxd6pJWiYh +Jxg== MIME-Version: 1.0 X-Received: by 10.205.15.72 with SMTP id pt8mr9267645bkb.17.1377165611477; Thu, 22 Aug 2013 03:00:11 -0700 (PDT) Received: by 10.204.38.74 with HTTP; Thu, 22 Aug 2013 03:00:11 -0700 (PDT) In-Reply-To: References: Date: Thu, 22 Aug 2013 05:00:11 -0500 Message-ID: Subject: Re: [FlyRotary] Fuel map scrambled. From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=20cf301cbd5c11dbd004e4865b0c --20cf301cbd5c11dbd004e4865b0c Content-Type: text/plain; charset=ISO-8859-1 David, I chased a similar problem on my 3-rotor back when it was barely out of initial flight testing. 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 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 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? On Wed, Aug 21, 2013 at 9:09 PM, wrote: > 1st..... am now on the ground safe & sound, no damage normal landing. > The story goes....... Level at 2500' above Mason Jewett Field, ( hazy > evening, 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 to do a full throttle > numbers gathering. Then the eng. started running very poorly, missing, > stumbling hard, destict loss of power, 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 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 flight, made no changes at that > time? At the airport by 6:30, pull plane from hanger 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 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 pitch test run. That was the start of the evening, > ended differently than I would have liked. But nothing bent. Did not > reset EC2 yet, am going to start eng. & check to see if computer B runs > ok, did not get a chance to throw that switch, when I found the sweet spot > I changed nothing, just came around & landed. What is the fix for this > anomaly?? David R Cook RV6A Rotary > --20cf301cbd5c11dbd004e4865b0c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
David,=A0

I chased a similar problem on= my 3-rotor back when it was barely out of initial flight testing. =A0Tried= a lot of things, but nothing seemed to fix the random re-set of the EC-2 M= AP table. =A0Someplace I heard about voltage spikes originating from the st= arter solenoid. =A0I installed a large diode across the "+" termi= nal of the starter solenoid and haven't had a problem since. =A0The cul= prit may be different with your a/c, but I would be very suspicious of anyt= hing that could generate voltage spikes. =A0Also, check all of your grounds= thoroughly. =A0

Good Luck, =A0

Mark S.

P.S. =A0The first thing Tracy always asks is, "Did y= ou try the B-controller?" =A0How does the B-controller MAP look?
=


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. =A0=A0 The story goes..= ..... Level at 2500' above Mason Jewett Field,=A0 (=A0 hazy evening, ap= rox. 7:30 pm=A0 )=A0 on the down wind abeam of the end of the runway, =A0 4= 600 rpm,=A0 ? MAP,=A0 125 MPH=A0 ind.,=A0 3rd circle around the patch getti= ng ready to put in full cruise pitch on prop to do a full throttle numbers = gathering.=A0 Then the eng. started running very poorly,=A0 missing, stumbl= ing hard, destict loss of power,=A0 tryed to descend & come around=A0 t= o land but am high & hot with=A0 (=A0 RV's need air brakes )=A0 eng= . smoothed out, chose a sweet spot & climbed out to go around,,, low=A0= but climbing,=A0 ran smooth 4000 rpm,=A0 landed ok.=A0 Before shutdown,=A0= checked fuel map bars for EC2=A0 on EM2,=A0 some in the middle some at the= bottom,,,Lean,,, why did the fuel map scramble suddenly,=A0 steady cruise = flight, made no changes at that time?=A0 At the airport by 6:30,=A0 pull pl= ane from hanger to do two tests tonight, 1st. run eng. at low power/idle li= ke sitting in line for takeoff from Osh or ?,=A0 how long can we stay runni= ng without getting to hot, 18 min. coolant 205 F,=A0 oil 175 F,=A0 ok that&= #39;s good enough for me lets go fly & do the prop full cruise pitch te= st run.=A0 That was the start of the evening, ended differently than I woul= d have liked.=A0 But nothing bent. =A0 Did not reset EC2=A0 yet, am going t= o start eng. & check to see if computer B runs ok, did not get a chance= to throw that switch, when I found the sweet spot I changed nothing, just = came around & landed.=A0 What is the fix for this anomaly?? =A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 David R Cook=A0 RV6A=A0 Rotar= y

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