Mailing List flyrotary@lancaironline.net Message #34209
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: 13b Water Pump: Plugging Bypass Hole
Date: Thu, 2 Nov 2006 22:53:38 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Hi Thomas,
 
Its a formula called Decalin TCP Plus (see below message). Chris provided me with 16 oz of the formula early this summer, but hangar work and other stuff kept my aircraft barricaded until my door was operational.  Its an experiment, but if it extends the useful life of the plugs and prevents SAG, it will be a nice thing to have.
 
  From what I have read, the normal TCP formula used in aircraft engines for lead removal, is not likely to work with our rotary engines because it apparently requires a high cylinder head temperature (above 350 F) for the lead removal chemical reaction to be effective.  We will see if the "Plus" perhaps overcomes this limitation.
 
It requires 1/2 oz for 10 gallons of 100LL fuel.  So if it does turn out to work as we hope, I'll simply mix 1 3/4 oz with my 2 cycle oil in the same 18 oz bottles I fly with when I fill them with oil.  I 've flow six hours with the stuff and no adverse reaction by the engine , so plan to continue. 
 
Ed
 
 
 
Sent: Thursday, June 08, 2006 12:46 AM
Subject: Re: Query from Decalin website

Ed,
      SAG sounds like it could really ruin your day.
 
The product was designed to react with lead, so it should work for you.  I suggest you try Decalin TCP Plus and see if it does.
I have enough of the magic ingredient to make a single 16 oz bottle for you, let me know what you want to do.
 
Chris Lowery
Decalin Chemicals LLC
 
----- Original Message -----
Sent: Thursday, November 02, 2006 9:36 PM
Subject: [FlyRotary] Re: 13b Water Pump: Plugging Bypass Hole

Hey Ed,
 
what solution did you "finally get to use"?
 
Thomas J.
----- Original Message -----
Sent: Thursday, November 02, 2006 8:25 PM
Subject: [FlyRotary] Re: 13b Water Pump: Plugging Bypass Hole

Hey, when your aging brain gets to this stage - you take whatever it gives you {:>).  Good luck on your inspection!  Ready for you to get this out of your system and come back to the dark side.
 
Heading to Louisiana this weekend.  Checking out the lead removal solution that I finally got to use (flying again!).  This trip will give me over 16 hours using the stuff, so will likely pull a plug when I get back to see its condition.
 
Ed
----- Original Message -----
Sent: Thursday, November 02, 2006 7:31 PM
Subject: [FlyRotary] Re: 13b Water Pump: Plugging Bypass Hole

I used a NPT tap - it was either 3/8 or 1/2" dia  (its been over a decade).
I simply tapped it for a threaded aluminum hex nut plug of that diameter and
screwed it in tightly and its still there after over 10 year of running.

Not bad Ed.  I'll give you full credit in consideration for your aging brain :-)
 
BTW, a good log and search engine makes up for that.  Imagine how I know this :-) 
 
From my log:
 
Tapped the bypass hole in the water pump housing with a ½” NPT tap.  This worked pretty darned well.  Installed an aluminum ½” pipe plug, with just a bit of high temp RTV on the threads.
 
Rusty (DAR inspection scheduled for the 11th, first flight maybe the 12th)




Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster