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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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