X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm19-vm0.access.bullet.mail.sp2.yahoo.com ([98.139.44.172] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with SMTP id 5046970 for flyrotary@lancaironline.net; Sat, 09 Jul 2011 12:45:02 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.44.172; envelope-from=keltro@att.net Received: from [98.139.44.105] by nm19.access.bullet.mail.sp2.yahoo.com with NNFMP; 09 Jul 2011 16:44:27 -0000 Received: from [98.139.44.68] by tm10.access.bullet.mail.sp2.yahoo.com with NNFMP; 09 Jul 2011 16:44:27 -0000 Received: from [127.0.0.1] by omp1005.access.mail.sp2.yahoo.com with NNFMP; 09 Jul 2011 16:44:27 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 681806.18092.bm@omp1005.access.mail.sp2.yahoo.com Received: (qmail 86973 invoked by uid 60001); 9 Jul 2011 16:44:27 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1310229867; bh=IitRXxfMkmCjbnMwZ3cbCO0+ibdnW05mfNGSPVvGnO0=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=xVgsBumDFcYOsf0npvnN3s9L+Xr+5Ly9A6zX/VAdGTd4ZA5XHKuqfhSYLxnISkxt97Mtu7pc8saJlScEDTyL23VbuceruqIJ/5ZzGHu9iJtXvnUiGcofVDy+F17NB6xkUYFpU4wih8B+MPeDLOPV4A4OCnOkiC2aeAZAtJ7P87w= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=att.net; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=NSkiMcp2QZWOsKl3IHGfgvfDCVh6daAHDQYPWMM63M6c2PCoPd9x+78BCKPWnroKMvPNc4K//4IhD4OeXptc25pfC59wZC3lSVJahYnHfsOrrhgD9fa1D4KUMTFpj89r5lXI0gWsGQ0eK25/u3Q4DpxO35QG4KtO4nysiIaxBww=; X-YMail-OSG: gcmTJe8VM1mJ4t4xy24sP2ujGs4SI7Fxr6Aji9lqvuFH4c_ vQ4fZFZqhKPL7aE.U8.zpkJsvlxcn9zZ4dwy8MVjLoFsLiAijklRxWdA3lLL Q7I6jQ2oOnVN5ySoW1bJSt5CblhzDPZVB2Xsmp4wnzgw8tIRuq4BnQpWylo3 qsGO_Gy5R6n4WoGLC0OGbFsoLHfuvNkHT5G9ne2igOZLJ3H0OaeYDY2pxsmK ITw2uB8fOpFdCzOVyJgGMCIV0m3jp2aTnzhm94Wd8aEne17PRyh4CSE_tJC3 WTUiyCIbvCXyYlfxBIco908M8tghov_8lZhMmRPGgcTYjjMO.GH138aOtEWg jw84ziZnR9ZXaBdt8dJ565RstdQPsCSFeYUbZxrUsCsk9DTnCt_sk16ZBgwA clLYeMb5saaQNI5Bn2VM8gmyhMBw1arhMLInZr7Q1A8JupA-- Received: from [208.114.39.18] by web83906.mail.sp1.yahoo.com via HTTP; Sat, 09 Jul 2011 09:44:27 PDT X-Mailer: YahooMailWebService/0.8.112.307740 References: Message-ID: <1310229867.80557.YahooMailNeo@web83906.mail.sp1.yahoo.com> Date: Sat, 9 Jul 2011 09:44:27 -0700 (PDT) From: Kelly Troyer Reply-To: Kelly Troyer Subject: Re: sheilded plug wires To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-544182434-1310229867=:80557" --0-544182434-1310229867=:80557 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Group,=0A=A0=A0=A0 A little educational info on plug wires and ignition sys= tems in general from "Magnacor"..........I do not profess=0Ato know how muc= h is true and how much is self serving hype.............FWIW...............= ..<:)=0A=A0=0Ahttp://www.magnecor.com/magnecor1/truth.htm=0A=0AKelly Troyer= =0A"DYKE DELTA JD2" (Eventually)=0A"13B ROTARY"_ Engine=0A"RWS"_RD1C/EC2/EM= 2=0A"MISTRAL"_Backplate/Oil Manifold=0A"TURBONETICS"_TO4E50 Turbo=0A=0AFrom= : Charlie England =0ATo: Rotary motors in aircraft= =0ASent: Saturday, July 9, 2011 11:11 AM=0ASu= bject: [FlyRotary] Re: sheilded plug wires=0A=0A=0ATo expand on that for th= e electron-challenged, an inductor is effectively a frequency dependent res= istor. The higher the frequency, the higher the resistance. So, the fundame= ntal pulse to the plug makes it through (though slowed slightly), while the= harmonics (noise) that were generated=A0 can't get past the extra resistan= ce presented to them.=0A=0AThe reverse is true for a capacitor. That's one = of the reasons why you see capacitors with one leg tied to the power supply= & the other to ground. The capacitor blocks DC but passes higher frequenci= es (the noise) to ground.=0A=0AI have no doubt that the above will make phy= sicists cringe, but it's close enough to working knowledge for us builders = to use.=0A=0ACharlie=0A=0AOn 07/09/2011 08:28 AM, Tracy wrote: =0AIn this c= ase "shielded" is the wrong term. =A0 The spiral wire does not actually shi= eld the noise, it prevents the noise from being transmitted. =A0 =A0It acts= as an inductor to prevent the propagation of the noise generated at the sp= ark gap from propagating up the wire.=0A>=0A>=0A>Tracy=0A>=0A>Sent from my = iPad=0A>=0A>On Jul 9, 2011, at 2:09 AM, Lehanover@aol.com wrote:=0A>=0A>=0A= >It has to do with the resistance of the long thin Monel wire. An impedance= mismatch and inductive reactance. What the mechanism is I do not know. Tha= t is why Tracy is here, to explain such matters.=0A>>=0A>>Lynn E. Hanover= =0A>>=0A>>In a message dated 7/8/2011 11:08:09 P.M. Paraguay Standard Time,= SBoese@uwyo.edu writes:=0A>>My last massage got a little garbled, the way = I have my wires configured now, the conductor and spiral wrap are exposed a= nd folded under the crimped teminal ends, so aren't both the conductor and = the spiral wrap acting as a conductor? What is doing the shielding?=0A>>>= =0A>>>Brian Trubee=0A>>> --0-544182434-1310229867=:80557 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Group,
    A= little educational info on plug wires and ignition systems in general from= "Magnacor"..........I do not profess
to know how much is = true and how much is self serving hype.............FWIW.................<= ;:)
 
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil = Manifold
"TURBONETICS"_TO4E50 Turbo

From:= Charlie England <ceengland@bellsouth.net>
To: Rotary motors in aircraft <flyro= tary@lancaironline.net>
Sent: Saturday, July 9, 2011 11:11 AM
Subject: [FlyRotary] Re: sheilded plug wires
To expand on that for the electron-challenged, an i= nductor is effectively a frequency dependent resistor. The higher the frequ= ency, the higher the resistance. So, the fundamental pulse to the plug make= s it through (though slowed slightly), while the harmonics (noise) that wer= e generated  can't get past the extra resistance presented to them.
The reverse is true for a capacitor. That's one of the reasons why you= see capacitors with one leg tied to the power supply & the other to gr= ound. The capacitor blocks DC but passes higher frequencies (the noise) to = ground.

I have no doubt that the above will make physicists cringe, = but it's close enough to working knowledge for us builders to use.

C= harlie

On 07/09/2011 08:28 AM, Tracy wrote:=20
In this case "shielded" is the wrong term.   The spiral wire does= not actually shield the noise, it prevents the noise from being transmitte= d.    It acts as an inductor to prevent the propagation of the no= ise generated at the spark gap from propagating up the wire.

Tracy

Sent from my iPad

On Jul 9, 2011, at 2:09 AM, Lehanove= r@aol.com wrote:

It has to do with the resistance of the long thin Monel wire. An imped= ance mismatch and inductive reactance. What the mechanism is I do not know.= That is why Tracy is here, to explain such matters.
 
Lynn E. Hanover
 
In a message dated 7/8/2011 11:08:09 P.M. Paraguay Standard Time, SBoese@uwyo.edu writes:
My last massage got a little garbled, the way I have my wires configur= ed now, the conductor and spiral wrap are exposed and folded under the crim= ped teminal ends, so aren't both the conductor and the spiral wrap acting a= s a conductor? What is doing the shielding?
 
Brian Trubee



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