Fuel/Water, Bearing/Rust

[Ed Miller]

What I've done for the last few years on both my 2C's and 4C's is at the end of the day, immediately after the last flight while the engine is hot I drain all the fuel from the tank. I then add 1 to 2 ounces of FAI ( 80% methanol 20% castor ) to the tank and run the engine on this till the engine won't fire any longer. The thought is to flush all the nitro/contaminated fuel from the engine while it is hot, nearly all the methanol will be burned off and all that will be left is a coating of castor in the engine ( diluted a bit with methanol, you never get it all out ). I use S&W fuel products and used both brass and aluminum tubed tanks without rusting problems with this procedure. I rarely fly more than twice a week and often do not fly for weeks at a time ( family, work and motorcycle all take priority ).
Ed M.
  ----- Original Message ----- 
  From: Del Rykert 
  To: discussion at nsrca.org 
  Sent: Saturday, December 06, 2003 9:25 PM
  Subject: Re: Fuel/Water, Bearing/Rust


  Thanks for info Dave. I wonder if you and Troy both have similar good engine service because you use your equipment much more than many of us.  What is Amsoil MP?  Where would we find it? 
      Again thanks for sharing what works so well for you.

          del
    ----- Original Message ----- 
    From: David Lockhart 
    To: discussion at nsrca.org 
    Sent: Saturday, December 06, 2003 1:16 PM
    Subject: Re: Fuel/Water, Bearing/Rust


    Around Sep 02, I rebuilt one of my OS EFIs - new conrod, Shadel AAC piston/liner, and a stainless steel rear bearing w/ 2 rubber seals.  I use S&W fuel, 22% nitro, 17% synthetic, 2% castor and run dry at the end of every flying session and then "burn" some Amsoil MP through the engine (yes, the engine will run on the propellant in the Amsoil MP).  A fair bit of the Amsoil MP "oil" remains in the engine.

    Approx 14 months and 700 flights later, the engine is running as strong as when it was rebuilt.  No bearing noise or roughness.  BTW - no brass fuel lines or clunk.

    Dave Lockhart
    DaveL322 at comcast.net
      ----- Original Message ----- 
      From: Bob Pastorello 
      To: discussion at nsrca.org 
      Sent: Saturday, December 06, 2003 11:17 AM
      Subject: Re: Fuel/Water, Bearing/Rust


      Good note, Ed!  And timely reminder about our old 2C .60 woes!  Man, my OS 61RF would go through the bearings like crazy!
          Maybe Dave L. will chime in about the double-seal bearings.  I'd bet just about anything that they're not "sealed", and that when removed, he's found plain ol' fuel oil leftovers coating 'em.  Maybe not.
          Dave ??  You home?

      Bob Pastorello, Oklahoma
      NSRCA 199, AMA 46373
      rcaerobob at cox.net
      www.rcaerobats.net

      Bob Pastorello, Oklahoma
      NSRCA 199, AMA 46373
      rcaerobob at cox.net
      www.rcaerobats.net


        ----- Original Message ----- 
        From: Ed Miller 
        To: discussion at nsrca.org 
        Sent: Saturday, December 06, 2003 10:12 AM
        Subject: Re: Fuel/Water, Bearing/Rust


        Think about this. Have you ever seen bearings rust in a tank with aluminum tubes and no clunk as in a Tetra bladder tank setup ?? I've seen it, Dave Funk's OS 140RX in his Hydeaway rusted the original bearing in very few flights. 
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