X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 07 Jan 2008 11:31:26 -0500 Message-ID: X-Original-Return-Path: Received: from [70.62.14.124] (HELO server1.USTEK) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2634303 for lml@lancaironline.net; Mon, 07 Jan 2008 08:05:12 -0500 Received-SPF: none receiver=logan.com; client-ip=70.62.14.124; envelope-from=r.simon@ustek.com X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C8512E.5081E176" Subject: RE: [LML] Re: One mag, One electronic ignition X-Original-Date: Mon, 7 Jan 2008 08:07:17 -0500 X-Original-Message-ID: In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: One mag, One electronic ignition thread-index: AchRLjqLtU+JDQerQJ+T24FJ1tfJOw== From: "Lancair" X-Original-Sender: "Robert Simon" X-Original-To: , This is a multi-part message in MIME format. ------_=_NextPart_001_01C8512E.5081E176 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Three years ago I designed my ES-P for a TSIO-550 with dual Lightspeed EI. It ran fine until well lean of peak, when the engine would fart instead of fire. Klaus changed a couple things including hardward and software and the problem went away. Then I ran into what seemed to be occassional electrical interference problems and the engine would skip a couple firings. It happened in bright day VFR but picturing a cold and stormy night etc. etc. etc. I reverted to one mag. =20 =20 A mixed system brings up the possibility of two completely different modes of failure but reduces the likelyhood of one failure mode's creating a 3800 lb glider. Couple months later on run-up the mag was smooth but EI test was very rough. I pulled the cowling and found a connector to the controller had failed, shutting off the EI spark to that cylinder. The failure had no doubt occurred during the previous flight but the mag just kept on doing its job and I did not notice the loss in power or change in temperatures.=20 =20 It is possible that the second EI would have continued to operate the engine fine but having two different systems with different weak links just feels better. =20 =20 Robert M. Simon ES-P N301ES ________________________________ From: Sky2high@aol.com [mailto:Sky2high@aol.com]=20 Sent: Monday, January 07, 2008 12:30 AM To: lml@lancaironline.net Subject: Re: [LML] Re: One mag, One electronic ignition In a message dated 1/4/2008 6:56:36 P.M. Central Standard Time, colyncase@earthlink.net writes: =09 - engine damage. lacking variable timing, all you have is mixture to protect your engine from harm. With fixed timing it's clear what to do (e.g. if you take APS). With some unknown timing curve in an electronic ignition box, I don't know what to do. I asked Klaus what his timing curve was really and he just blew me off. Lacking that information, I wasn't willing to have his box in my airplane. Colyn, =20 Electro Air's timing is published in the CAFE Reports and a display is available. =20 Light Speed has an optional display of the timing. I have one installed and often report the timing along with other power parameters. The more experimentally minded can also modify the timing with the addition of a pair of potentiometers. =20 Pmag/Emag does not display timing data nor provide information about the timing. =20 Slick's LASAR is the best example of secret timing - so secret you cannot find out why the magneto mode works better than the LASAR in certain circumstances. LASAR was to be the best of both worlds, EI failures revert to a magneto. Too bad their EI engineering was so bad. =20 Read Pauls L's indictment of magnetos. I still don't know why some think mags are so infallible considering all the weak points (no pun intended) inherent in them.=20 =20 PRISM is what some of us from the old mainframe software business would call vaporware. =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Pilot not TSO'd, Certificated score only > 70%. ________________________________ Start the year off right. Easy ways to stay in shape = in the new year.=20 ------_=_NextPart_001_01C8512E.5081E176 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Three years = ago I=20 designed my ES-P for a TSIO-550 with dual Lightspeed EI.  It ran = fine until=20 well lean of peak, when the engine would fart instead of fire.  = Klaus=20 changed a couple things including hardward and software and the problem = went=20 away.  Then I ran into what seemed to be occassional electrical=20 interference problems and the engine would skip a couple firings.  = It=20 happened in bright day VFR but picturing a cold and stormy night etc. = etc. etc.=20 I reverted to one mag. 
 
A mixed = system brings up=20 the possibility of two completely different modes of failure but reduces = the=20 likelyhood of one failure mode's creating a 3800 lb glider.  = Couple=20 months later on run-up the mag was smooth but EI test was very = rough.  I=20 pulled the cowling and found a connector to the controller had = failed,=20 shutting off the EI spark to that cylinder.  The failure had no = doubt=20 occurred during the previous flight but the mag just kept on doing its = job and=20 I did not notice the loss in power or change in temperatures.=20
 
It is = possible that the=20 second EI would have continued to operate the engine fine but = having two=20 different systems with different weak links just feels better. =20
 
Robert M.=20 Simon
ES-P=20 N301ES

From: Sky2high@aol.com = [mailto:Sky2high@aol.com]=20
Sent: Monday, January 07, 2008 12:30 AM
To:=20 lml@lancaironline.net
Subject: Re: [LML] Re: One mag, One = electronic=20 ignition

In a message dated 1/4/2008 6:56:36 P.M. Central Standard Time,=20 colyncase@earthlink.net writes:
- engine damage.  lacking variable = timing, all you=20 have is mixture to protect your engine from harm.  With fixed = timing it's=20 clear what to do (e.g. if you take APS).  With some unknown = timing curve=20 in an electronic ignition box, I don't know what to do.  I asked = Klaus=20 what his timing curve was really and he just blew me off.   = Lacking=20 that information, I wasn't willing to have his box in my=20 airplane.
Colyn,
 
Electro Air's timing is published in the CAFE Reports and a display = is=20 available.
 
Light Speed has an optional display of the timing. I have one = installed and=20 often report the timing along with other power parameters.  The = more=20 experimentally minded can also modify the timing with the addition of a = pair of=20 potentiometers.
 
Pmag/Emag does not display timing data nor provide information = about the timing.
 
Slick's LASAR is the best example of secret timing - so secret you = cannot=20 find out why the magneto mode works better than the LASAR in = certain=20 circumstances.  LASAR was to be the best of both worlds, = EI failures=20 revert to a magneto.  Too bad their EI engineering was so = bad.
 
Read Pauls L's indictment of magnetos.  I still don't know why = some=20 think mags are so infallible considering all the weak points (no = pun=20 intended) inherent in them.
 
PRISM is what some of us from the old mainframe software business = would=20 call vaporware.
 
Scott Krueger AKA=20 Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL = (KARR)

Pilot not=20 TSO'd, Certificated score only > 70%.



Start the year off right. Easy ways to stay in shape in the new year.=20
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