X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 50 [XX] Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2047992 for flyrotary@lancaironline.net; Wed, 16 May 2007 14:05:27 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C797ED.4D351EDE" Subject: RE: [FlyRotary] Problem found and fixed. Disposition-Notification-To: "Bobby J. Hughes" X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Date: Wed, 16 May 2007 13:06:22 -0600 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Problem found and fixed. Thread-Index: AceX7HB0BvtMCGn1RkOjy9zln/3rJwAAKU/w From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C797ED.4D351EDE Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Ed, =20 Are you using one power lead for all coils or powering L /T separately? =20 Bobby ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Wednesday, May 16, 2007 11:11 AM To: Rotary motors in aircraft Subject: [FlyRotary] Problem found and fixed. After my uneventful 1600 mile detour through Louisiana after Sun & Fun, I went out several days later and could not start the engine. Didn't have time to trouble shoot it then, but I did today. =20 The simulation modes were a great help. If put the EC2 in mode 1 (fuel pumps off) and pushed the store button - the injectors clicked like mad. I detached one sparkplug wire , placed a screw driver in it and laid it on the motor mount. I put the EC2 in mode 8 (ignition) and pressed the store button - nothing, nada, not a spark. =20 So I started from the circuit breaker, confirmed I had voltage on each side. Next was a Molex circular plug which connects the instrument panel wiring to the airframe, I have 6 of them. I pulled the one which had the power line to the ignition coils and noticed that the power pin did not look bright and shiny as did the others. I sprayed some Corrosion X on it and stuck it back on - the engine fired right up. =20 However, during the running it died at low rpm, so I pulled the plug back off an got out my near vision glasses and noticed that not only did it not look shiny but it looked slightly pitted and corroded. So I got out some fine sand paper and clean the pin and took a small fine tooth file and gentle "reamed" the socket. Put it back together and that apparently did the job. I wiggled the plug quite a bit while the engine was running and no further disruption of the ignition. =20 Lesson Learned? Well, way back when I was doing my wiring (hard to believe over a decade ago), I was faced with a choice of pins - tin or gold plated. Well, need I say which one I went with - the tin ones, they were cheaper naturally. Later on I decided to use gold plated pins/sockets for the critical circuits (of which this is one), but never went back and changed this one (after all I did want to fly in my life time). =20 =20 Perhaps Bob White can chime in here, my recommendation would be to go with the gold plated pins vice the tin plated on for critical systems especially where they might be exposed to weather (like the tip up canopy can do). =20 =20 Anyhow, back in running shape - I did pull all the remaining plugs and squirted some Xrossions on the pins. None of the others had the dark/pitted look to them. =20 Those simulations modes are really an asset in trouble shooting. Thought I would pass this on. =20 Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html ------_=_NextPart_001_01C797ED.4D351EDE Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Ed,
 
Are you using one power lead for all coils or = powering L /T=20 separately?
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Wednesday, May 16, 2007 11:11 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Problem found and=20 fixed.

After my  uneventful 1600 mile detour = through=20 Louisiana after Sun & Fun, I went out several days later and could = not start=20 the engine.  Didn't have time to trouble shoot it then, but I did=20 today.
 
The simulation modes were a great = help.  If put=20 the EC2 in mode 1 (fuel pumps off) and pushed the store button - the = injectors=20 clicked like mad.  I detached one sparkplug wire , placed a screw = driver in=20 it and laid it on the motor mount.  I put the EC2 in mode 8 = (ignition) and=20 pressed the store button - nothing, nada, not a spark.
 
So I started from the circuit breaker, confirmed = I had=20 voltage on each side.  Next was a Molex circular plug which = connects the=20 instrument panel wiring to the airframe, I have  6 of = them.   I=20 pulled the one which had the power line to the ignition coils and = noticed that=20 the power pin did not look bright and shiny as did the = others.  =20 I sprayed some Corrosion X on it and stuck it back on - the engine fired = right=20 up.
 
However, during the running it died  at low = rpm, so I=20 pulled the plug back off an got out my near vision glasses and noticed = that not=20 only did it not look shiny but it looked slightly pitted and = corroded.  So=20 I got out some fine sand paper and clean the pin and took a small fine = tooth=20 file and gentle "reamed" the socket.  Put it back together and that = apparently did the job.  I wiggled the plug quite a bit while the = engine=20 was running and no further disruption of the ignition.
 
Lesson Learned? Well, way back when I was doing = my wiring=20 (hard to believe over a decade ago), I was faced with a choice of pins - = tin or=20 gold plated.  Well, need I say which one I went with - the tin = ones, they=20 were cheaper naturally.  Later on I decided to use gold plated = pins/sockets=20 for the critical circuits (of which this is one), but never went back = and=20 changed this one (after all I did want to fly in my life = time).  =20
 
Perhaps Bob White can chime in here, my = recommendation=20 would be to go with the gold plated pins vice the tin plated on for = critical=20 systems especially where they might be exposed to weather (like the tip = up=20 canopy can do).   
 
Anyhow, back in running shape - I did pull all = the=20 remaining plugs and squirted some Xrossions on the pins.  None of = the=20 others had the dark/pitted look to them.
 
Those simulations modes are really an asset in = trouble=20 shooting.  Thought I would pass this on.
 
Ed
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html
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