MINTOR

[Ihncheol Park]

Jim,
I have a few questions,
140 turns APC 16.5 x 12W @ 8350
170 turns APC 17 x 12 @ 8100
both with 15% Cool power?

How rich are the engines running?
I am not sure how the two props are loading when use on a same engine, but
the output figures sound like 140 is running better.

How about fuel consumption of both engines?

Thanks,

Ihncheol Park
  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Woodward James R Civ 412 TW/DRP/ACQ
  Sent: Monday, May 12, 2003 8:43 AM
  To: discussion at nsrca.org
  Subject: RE: MINTOR


  Hi Eric, Dean,



  I've ran the both the 3M 140 and 170.



  The 140 only saw 15% Cool Power and two OSA5 plugs.  From the first start
in my drive way it ran as good as you can expect a new engine to run.  I ran
two tanks using idle, mid, and W.O.T.  Then, took to flying it.  After a few
flights, engine was tached at 8350 with the apc 16.5 x 12W (with header cut
1.0").



  The 170 saw 25% Cool Power from the start, with 1 OSA5 and 1 OSF.  This
weekend, I switched to 15% Cool Power and two OSA5 plugs.  I needed to
readjust the high and low end.  High end was about 5/8 turn leaner.  After a
few flights, it was turning the 17 x 12 apc at 8100.  At this ground
setting, the uplines did not show any signs of sagging.  Maneuvers like the
top hat w/ ¾ up, or the figure 9 with 3/2 can be as tall as you like -
really cruising over the top.  Also, header is cut 1.0" shorter than stock.



  What I noticed this weekend using the 15% fuel, which was not as prevalent
with the 25% fuel, is that when landing, I needed to lower the idle trim.
At launch, idle was 1900-2000.  All the ground running and throttling would
always come down and hit the idle speed.  However, after the full flight, I
needed to lower the trim or it would want to float on by.

  Jim W.



  -----Original Message-----
  From: Dean Pappas [mailto:d.pappas at kodeos.com]
  Sent: Monday, May 12, 2003 8:03 AM
  To: discussion at nsrca.org
  Subject: MINTOR



  Hi Eric,

  Dean here ... The 140 finds K&B 1-L plugs too hot, the "F"s have got to be
even moreso!

  I found the same issue with needing a few minutes of running to loosen-up
adequately in order to be able to run at W.O.T.

  It helps to fatten the mid-range with the idle mixture screw.

  You will find it has a tremendous amount of authority over the mid-range
mixture, and can easily over-lean the engine there.

  Dean


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