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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-960008@logan.com>
Subject: TPC for SAG "SparkPlugs"
Date: Sun, 29 Jan 2006 23:45:40 -0500
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I did a bit of research on the use of TCP and from one article on its use to 
lessen plug fouling on aircraft spark plugs, the article indicated that it 
required a CHT of 350F - this is probably considerably more than what we 
find in a rotary since it is water cooled.  So may raise the question of 
whether TCP is effective for our application.

Ed

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
----- Original Message ----- 
From: "Bill Bradburry" <bbradburry@allvantage.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, January 29, 2006 6:23 PM
Subject: [FlyRotary] SAG "SparkPlugs"


> Has anyone tried TCP?
>
> "Snip"
>
> The proper name of the stuff is Tri-Cresyl Phosphate (spelling
> questionable), a clear liquid, and you can get it from many FBO's. 
> Aircraft
> Spruce carries it and the required dispenser kit (listed in the Fuel
> Additives section of their catalog). I usually buy it in quart (maybe
> liter - I haven't checked) cans. Each can has a built-in insert that is
> designed to interface with the dispenser syringe.
>
> Not being a chemist, or an expert on internal combustion processes, I 
> can't
> talk about the actual in-cylinder mechanism - but here it is in layman 
> terms
> as I understand it: TCP mixed with the leaded fuel in very small
> concentrations modifies the potential (metallic) lead deposits that are
> freed from the leaded fuel during combustion, to a form (a soft compound)
> that is readily blown out of a cylinder during the exhaust stroke.
> "Snip"
>
> Bill Bradburry
>
>
> --
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