Subject: Too Much 2-Stroke Oil
From: Rotary Engine
Date: 10/30/2007, 4:05 PM
To: AARotary Engine




        What's the practical upper operational limit to how much
   2-stroke oil
        can be added to the fuel and still have reliable
   operation?  Options I
        can think of:

          - Eventually you'll have so much oil it fouls the plugs
   (unlikely?).
          - Eventually you'll have so much oil it lowers the effective
   octane
        rating of the fuel (unlikely?) to the point of
   detonation/preignition.
          - Eventually you'll have so much oil it lowers the power
   output such
        that it won't make takeoff power.
          - You can't have too much 2-stroke oil - it'll run on 1:1.

        Is the upper limit so far above how much you'll ever
   accidentally put in
        the tank so as to not be a factor?  I am envisioning accidentally
        adding
        the 2-stroke oil twice - doubling the mix ratio.  Probably not
   a concern
        - just curious.

        Side question: How long will it run if you forget to put any
   into a load
        of fuel?  Would there be any way to detect this
   condition?  Will your
        fuel calibration be off enough to detect it (assuming capacitive
        sensors).


        Regards,

        Matt-

        Jim Mederer reports up to four ounces per gallon does not hurt.
        George Graham flew from Tennessee to upstate NY forgetting to
   put oil
        in the fuel. Engine continued to run for dozens of hours. Engine
        never failed up until he died from cancer this year.
        --
        Paul Lamar ...No rotor no motor.

   Thanks Paul..

   Remind me, what's the ideal mix?  4oz/gal is 32:1..


   Matt-

   One ounce per gallon.

   --
   Paul Lamar ...No rotor no motor.


Cool.  That means it would take a cascade of screw ups to cause an issue.


Matt-


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