Mintor eyes only/Power wish list

[Gene Maurice]

OK, try this on for size OS160FX (< $250), Perry Regulator Pump ($27), KM
Header ($45), Mac's 15cc Quiet Pipe ($78), AFC SS double sealed bearing
($15), total cost right at $400 INCLUDING exhaust system!! NOW the kicker:
APC 17x12 standard blade (read wide) 8300 RPM (APC 16.5x13 W turns about the
same) on Magnum 15%, idles at < 1800 RPM all day long, transitions almost "4
stroke like". Though it has not been measured with a sound meter, I dont
think over the limit. If it is, a 17x13 or 17x14 would probably do the
trick.

Gene Maurice
gene.maurice at attbi.com
Plano, TX
AMA 3408
NSRCA 877


  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Anthony Abdullah
  Sent: Thursday, May 29, 2003 10:34 AM
  To: discussion at nsrca.org
  Subject: Mintor eyes only/Power wish list


  I am eagerly watching the posts on engines and am very excited about the
choices available. I must say that it says an awful lot about the YS140 DZ 4
stroke that it is even in the same power range or even superior to a
significantly larger 2 stroke. I remember back in the day that a plane that
would fly on a 60 two stroke needed at least a 90 to 120 four stroke to fly.
Boy have things changed. I am still sitting on my wallet with my fingers
crossed hoping that YS will introduce a 140 or 160 AR two stroke. Black
machined finned head and all. It will be reliable, run with the currently
available ES and other pipes, Idle smoothly, snap transition with no mixture
change at mid range, spin a 17x12 at 8400 RPMs with a flat torque curve,
have a totally linear throttle curve, and sealed bearings. All for around 4
bills.

  Then I woke up.

  "Henderson,Eric" <Eric.Henderson at gartner.com> wrote:
    In case you have had enough of this topic just hit CRTL-D

    If you have not had enough, here is today's lunch results.

    It was warm and muggy today after all of the rain. The Mintor had the
"target" 17 x 13 APC strapped on the front. With three gallons through the
engine it was time to really see what the 1.70 was made of! Engine was set
at 7,900 rpm on the ground using Powermaster 15/16. The Hydeout was ready
for the ride.

    Here's how it flew P-03, or at least a description of a few of the
maneuvers as I saw them unfold.

    Sq. loop on corner - Straight and level into the 45 climb at 1/3
throttle. Nice even pull. Increase power around the first corner to 3/4.
Perform 1/2 roll and got on to full power (WOT). Plane continues on at
slightly increased and smooth speed with the real need to back of the gas
over the top corner. Long down line 45's and the engine responds smoothly on
the bottom pullout to level. No gurgle. Upon reflection it was a big loop
before I noticed.

    Hour glass - very similar with a lot of grunt on the up 45 line.

    All vertical lines were easy with a big punch over the top of maneuvers
such as Humpty-bumps. The down lines were flown very long to look at speed
etc. The idle can be set low and it does not quit. This helped the down
lines and allowed pull-outs that did not bend the wing tubes. The idle for
spin entry was actually too low and a purr had to be added to both reach the
middle and get the nose up.

    The big test was the figure-9 with 3 x 1/2 rolls going up. An entry at
1/4 throttle as I pushed followed by a incrementing amount of throttle as
each 1/2 roll was executed ending in full throttle over the top of the 9.
This was a big 9. Too big for good points but just right for free adrenaline
shots!

    So how does it (1.70) compare with the OS 1.60. About 200 rpm less on
the ground but 4.0 oz lighter. Vertical behavior very similar between equal
weighted planes.

    So how about the DZ. In the same plane it was clear that the DZ had the
edge in the mid range grunt-dept. Vertical snap rolls were equal however in
vertical line recovery.

    In the end it comes down to probably five things. Price, Serviceability,
Reliability, weight and price. Depending upon what you need you can chose
the performance of a 2-c or a 4-c the personal taste of sound and throttle
timing.

    I would run all three for equal fun, but as far as price goes, (The OS
in this case is an FI), the Mintor has a big edge.

    Regards,

    Eric.




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