X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=EuKsUhUA c=1 sm=1 tr=0 a=Xmx/tSr6Fvg6eVx5RPhjvQ==:117 a=reM5J-MqmosA:10 a=XYpRal2UOYkA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=on22okXAAAAA:8 a=7g1VtSJxAAAA:8 a=o0o1IIkXG2-ub5f69PgA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=6qEbh9vCPIPDL4A5:21 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=NPqpj5bUEVj9vR1HIonK:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Ernest Christley echristley@att.net" Received: from sonic316-9.consmr.mail.gq1.yahoo.com ([98.137.69.33] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 706975 for flyrotary@lancaironline.net; Tue, 01 Sep 2020 10:02:45 -0400 Received-SPF: none receiver=logan.com; client-ip=98.137.69.33; envelope-from=echristley@att.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1598968948; bh=OEVPYt9bh+SPKZF9vhn97l+c3dNvXJpyZWElE1TuXRA=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=YZZHoFB4wUOF5+Op1pKFzzxCFhTTdbPg2ui1PqCZIhI+poU201+lTXIbjoUAcCaZly38YqGJotpOw0mnXz5davcbtABYnkSFUEXF8nlrhi3j5pzOjnzTo2oHfEKwuHeGKdv5/WYhkSZQuDKgE1sUsbdZfJ2NQ3wfL8BDi+crgRI= X-YMail-OSG: nTXWZLsVM1kBllJCyRU4vkeCrowsB5leZaaBsw7itilpDWanl1gmp7tB1By6W6k 9V4Ef2NguWG6L7QvFiL0T472IS1rD96hCM3f_3O4kLtGLtl_gIxEC84sJibGGVGsbyJ3IdtapHHV 9qflrqVGDTmgGDm6V.ozDJ9pSxqVa4bfjn_4LxmztMWqUxQfkUnnojfytG.GwpSigAUxSc5U0v9y h3sQ.1UN5_HjIrZ9h42DOtAoDla3PpoVx1hEzpSjlrO5PTFz_GblPy36exSZu4uuealq5DdC.oBw jySvgukJ9E58JOKBavzmNWvwrV6W0_HdpMCLUt_1geox5GGJVJfj49KZz7FvgA4g7w0WdXpllvJU Dad4OSjCV6fiFpp9b1MT8zQclvW4YVUkCkFvP44aP.Q3gJm5TxpZTx0i6_DTQ.ibmEicKr9aPHRe Jy7JsZGREZ4XVipW1PvOy4qWlojpBKIt8yhOiI8Ai.BNTcZOZpl04ux9cGpHykkMCdKeC8yI6fsw XWFJcIsWMyvwzCsjz918yt1xljpvErch9PB5lkHZZuVfjra_iMvtz8Paz0nsmmw68yVVOzzCMAQZ BFr252iSTeuIYtXkiV5WUga.CTHPusNrg6REzZBPeFCFOAoFhjpDxdYAHsgHU.3uhQPQqlV_CML. TjPUMIvPVisLhkcfzycGrXT1V3WXRnuEMWhH8_tK949KmUM2byRJf_.uvkULoXPAJNf0h7QuhkjN f0UZeiWxlPC4Hra5oOiey1S5wXKhzSBvfjkoieDblyTEVlhF8Z.lnKyRjSHXw9W7pPpL8AHActww 7aoZMb2La2oeeggfaBVMNwxTAgpcSxApWvYh3To6UnyrTLJ9skf4oyV4WXS2qJxxmd6mZkc6n0gh 9ixQ0.FGMsVINeIII8c1Q6jL9BphpJp..Cv15W9IV7aHX7xbWI.wlcjGy2DA5TQ3uW5dxYp4PdQh BggEmUv0W5xuwKRLuYRtfaJq32URkpZK3iDHVJ3NE48T1TLj2HsIEXmUnBcavZ0Q7ARHYooD3w21 oM2OZcKUQr1UDga2xNZW2d0yDcOW30wDUc47A_sZJyuL2jsil6aQ08bMCZGekGnPhLwJO3MJwNc0 TuUZVXev0hmpJ_tpbiJmQiVKrSOnKvim1_YhDflBbgiGu1mI0YN8Z52sNRGk.e.osVhC_uRJRB38 VLSFI7yEJQghoThe.SzlDRarQnBsUMlOcI89FMT9zi7iO4fXdVlU28G82CiSVgwqmw.d.EXufUYY 2ZgBwo96KAK_BLOE2e8BKPZ4l1u6IgcufzX35QounrS7TKotlyGZPtASrq61Hrif.tSI7UOn6dfP tvaF80aqwPuC1avraMxBPQsflJl9.0voGdjLFYZhLRBumqeQICCoukvk2f1XpSSlqwlBiAhHI0nV 1hEDf0sU9pylxqurMxhnApJ_M3Xg.3y_FN2XvM18lm7YCCWbnzws- Received: from sonic.gate.mail.ne1.yahoo.com by sonic316.consmr.mail.gq1.yahoo.com with HTTP; Tue, 1 Sep 2020 14:02:28 +0000 Date: Tue, 1 Sep 2020 14:02:24 +0000 (UTC) To: "Charlie England ceengland7@gmail.com" Message-ID: <1834924906.1202776.1598968944470@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] Re: Spark Plug SAG and Electrical Interference MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1202775_589361274.1598968944468" X-Mailer: WebService/1.1.16565 YMailNorrin Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:79.0) Gecko/20100101 Firefox/79.0 Content-Length: 9173 ------=_Part_1202775_589361274.1598968944468 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Case in point:=C2=A0 I spent most of last winter trying to get my Corvair = engine to start.=C2=A0 It would occasionally try, but just would not run.= =C2=A0 I finally pushed on the wire between the coil and distributor, and f= elt a click.=C2=A0 The wire boot was holding the wire on the post, but ther= e was enough of a gap to break the connection.=C2=A0 Once I 'clicked' it in= to place, the thing spun right up. You may have just had a loose plug wire. On Tuesday, September 1, 2020, 9:52:34 AM EDT, Charlie England ceenglan= d7@gmail.com wrote: =20 =20 Don't forget that when we change something, we often change something. (El= se.). :-) Since power wasn't affected, the safe and real test would be to re-install = the plugs and fly. Same problem: almost certainly bad plugs. No problem: li= kely either you cleaned up a bad connection somewhere, or the ignition syst= em had moisture on/around it, that got baked out well by the time the engin= e cooled off after the last problem flight. Which would drive me to close i= nspection of all terminations, coil housings, etc. Charlie | | Virus-free. www.avast.com | On Tue, Sep 1, 2020 at 8:37 AM Jeff Whaley jwhaley@datacast.com wrote: Hi Steve, I checked all four plugs and initially they would measure high im= pedance (Mega Ohms) but as I forced the fine tip of the probe through the c= arbon build-up they all measured slightly over 4000 Ohms, so they have not = gone open-circuit but do have carbon deposits, though nothing unusual for a= plug with about 50 hours operating time.=C2=A0 I'm not going to toss them = in the garbage just yet, actually will give them a thorough cleaning and ma= ybe try them again later - for now I'm sticking with the noise-free ones. Jeff -----Original Message----- From: Jeff Whaley=20 Sent: August-31-20 8:14 AM To: Rotary motors in aircraft Subject: Re: [FlyRotary] Spark Plug SAG and Electrical Interference Thanks Steve, so the plug itself is acting like a mini antenna ... I can ea= sily check the resistance from end to end and measure some other plugs lyin= g around. Yes, there was no SAG - engine was making normal power. Jeff, I have gotten RF interference from resistor type spark plugs including BR10= EIX when the internal resistor element fails and an arc occurs internally.= =C2=A0 This can be verified by checking the resistance between the center e= lectrode tip and the end where the spark plug wire attaches.=C2=A0 The resi= stance should be in the neighborhood of 5000 ohms with a good plug and infi= nite or open circuit on one that has failed. My experience is that this type of failure is unrelated to SAG. Steve Boese -- Homepage:=C2=A0 http://www.flyrotary.com/ Archive and UnSub:=C2=A0 =C2=A0http://mail.lancaironline.net:81/lists/flyro= tary/List.html =20 ------=_Part_1202775_589361274.1598968944468 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Case in point:  I spent= most of last winter trying to get my Corvair engine to start.  It wou= ld occasionally try, but just would not run.  I finally pushed on the = wire between the coil and distributor, and felt a click.  The wire boo= t was holding the wire on the post, but there was enough of a gap to break = the connection.  Once I 'clicked' it into place, the thing spun right = up.

You may have just had a loose plug wire.

=20
=20
On Tuesday, September 1, 2020, 9:52:34 AM EDT, Charlie = England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:


Don't forget tha= t when we change something, we often change something. (Else.). :-)

Sinc= e power wasn't affected, the safe and real test would be to re-install the = plugs and fly. Same problem: almost certainly bad plugs. No problem: likely= either you cleaned up a bad connection somewhere, or the ignition system h= ad moisture on/around it, that got baked out well by the time the engine co= oled off after the last problem flight. Which would drive me to close inspe= ction of all terminations, coil housings, etc.

Charlie

=09 =09=09 =09
3D""Virus-free. <= a rel=3D"nofollow" target=3D"_blank" href=3D"https://www.avast.com/sig-emai= l?utm_medium=3Demail&utm_source=3Dlink&utm_campaign=3Dsig-email&= ;utm_content=3Dwebmail&utm_term=3Dlink" style=3D"color:#4453ea;">www.av= ast.com =09=09

On Tue, Sep 1, 2020 at 8:37 AM Jeff W= haley jwhaley@datacast.com <= flyrotary@lancairon= line.net> wrote:
Hi Steve, I checked all four plugs and initially they= would measure high impedance (Mega Ohms) but as I forced the fine tip of t= he probe through the carbon build-up they all measured slightly over 4000 O= hms, so they have not gone open-circuit but do have carbon deposits, though= nothing unusual for a plug with about 50 hours operating time.  I'm n= ot going to toss them in the garbage just yet, actually will give them a th= orough cleaning and maybe try them again later - for now I'm sticking with = the noise-free ones.
Jeff

-----Original Message-----
From: Jeff Whaley
Sent: August-31-20 8:14 AM
To: Rotary motors in aircraft
Subject: Re: [FlyRotary] Spark Plug SAG and Electrical Interference

Thanks Steve, so the plug itself is acting like a mini antenna ... I can ea= sily check the resistance from end to end and measure some other plugs lyin= g around.
Yes, there was no SAG - engine was making normal power.

Jeff,

I have gotten RF interference from resistor type spark plugs including BR10= EIX when the internal resistor element fails and an arc occurs internally.&= nbsp; This can be verified by checking the resistance between the center el= ectrode tip and the end where the spark plug wire attaches.  The resis= tance should be in the neighborhood of 5000 ohms with a good plug and infin= ite or open circuit on one that has failed.

My experience is that this type of failure is unrelated to SAG.

Steve Boese


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.= net:81/lists/flyrotary/List.html
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