[NSRCA-discussion] Mintor 140 help

[Lance Van Nostrand]

Paul,

I also suggest using a hemo when you shut down.  The pump can allow flow through (like an OS140 pump) if there is any siphon pressure and the carb setting for idle is quite a bit open, allowing flow through.  Or you can have a permanent kill position when you shut down on the throttle arm.  there's a sweet spot where the idle is lean enough to hold ground idle and not be too lean in the air. You don't want it to rev up on downlines.  a backfire is a sure sign of leanness in the air.  Which mintor pipe do you have?  It's possible a little more space is needed at the coupler.  In the meantime, keep a higher idle as you walk out to the runway.
--Lance

  ----- Original Message ----- 
  From: Wayne Galligan 
  To: NSRCA Mailing List 
  Sent: Saturday, July 01, 2006 10:09 AM
  Subject: Re: [NSRCA-discussion] Mintor 140 help


  Lengthen the pipe a little if you have already leaned the low end and readjust needles.

  Wayne Galligan
    ----- Original Message ----- 
    From: Paul Duffy 
    To: nsrca-discussion at lists.nsrca.org 
    Sent: Saturday, July 01, 2006 10:56 AM
    Subject: [NSRCA-discussion] Mintor 140 help



    I have a Mintor 140 in a Patriot, using Mintor's header and carbon fiber pipe with ~1/2" between the header and pipe, turning an APC 17-12N.  I have just broken it in running 5 tanks (14 oz ea) of PowerMaster 15%.  I am running it on the rich side, turning about 7000-7200 rpm.  After starting the engine, I run it up for a few seconds before disconnecting the glow plug, then I bring it back to a fast idle (~2200 rpm).  By the time I get it out to the flight line to take off (a few seconds), when I open the throttle it loads up and dies.  I have started to lean out the idle mixture a bit and this seems to help.  I am a little hesitant to lean the main needle further - I had to replace the piston/ring/cylinder liner due to previous lean runs (entirely my fault).  Once I get it in the air, it seems to run fine, but the fuel seems to run out quickly.

    The other thing that is happening is that the carb drips a bit after I fill the tank.  It was much worse when the tank was above the wing tube, but I repositioned the tank in front of the wing tube, as low as possible, and it isn't as bad as it was.  This is a 16 oz tank.

    My plan is to do the following:
      a.. Start the engine, run it up to full throttle, monitor the rpm with a tach, then turn in the main needle until the rpm peaks and then drops (indicating lean), then richen it 3 or 4 clicks.  I'll try to fly it like this and see if I have the same problem. 
      b.. If it is still loading up on idle, then I'll lean the idle mixture further and repeat the previous step.
    Is this a good approach?  Any other thoughts?

    Thanks.


----------------------------------------------------------------------------


    _______________________________________________
    NSRCA-discussion mailing list
    NSRCA-discussion at lists.nsrca.org
    http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


------------------------------------------------------------------------------


  _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060703/5117fb33/attachment.html