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Date: Mon, 11 Jun 2007 13:19:02 -0600
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: MSD type Ignition CD or not?   was  Re: Spark
 Plug Cleaning
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Thanks Ed and Bill,

I'll pull my plugs one of these days and take a look.  I haven't been
getting to the airport quite as often lately.

Bob W.


On Mon, 11 Jun 2007 14:31:43 -0400
wrjjrs@aol.com wrote:

>=20
> Pretty good description Ed,
> Also look for a darker track from the center electrode to the shell. Of=20
> course if you have tracking you will have fouling shortly afterward.
> Bill Jepson
>=20
> -----Original Message-----
> From: Ed Anderson <eanderson@carolina.rr.com>
> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
> Sent: Mon, 11 Jun 2007 11:23 am
> Subject: [FlyRotary] Re: MSD type Ignition CD or not? was Re: Spark=20
> Plug Cleaning
>=20
>=20
> Bob, this is what I have observed. The ceramic will be dark colored -=20
> dark charcoal - almost black. But, that would probably look that way=20
> with carbon fouling also. But, when I shine a strong light on the=20
> ceramic cone, light glitters off of what I believe to be lead crystals=20
> - if I am correct then that could be a sign of lead fouling. In other=20
> words, carbon fouling appears to leave a dull charcoal/black color=20
> whereas the lead apparently leaves dark metallic crystals of some sort.=20
> That's the best I can conclude.=A0
> =A0
> Ed=A0
> =A0
>=20
>=20
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>=20
> --
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--=20
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
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