<br><font size=2 face="sans-serif">Hi All,</font>
<br>
<br><font size=2 face="sans-serif">I now have 6 flights on the Impact.
Not a hint of a problem yet. I've tamed the "kick"
of the Hacker by using a simple procedure. Once plugged in, I raise
the left slider (now slaved as throttle trim) so that the engine starts
turning over in the 300 rpm range (which has no, to just a very small kick),
then raise the throttle to full throttle, then down to idle. With
the Acro 90 set, I then reset the idle rpm for around the 300 rpm range,
and fly. The idle stays through out flight. Also, Acro 90 is
set with the "exponential" curve in the controller, and I've
adjusted the transmitters (9WCII) to somewhat of a reverse expo, and the
feel is really nice like this. Small reductions from full throttle
are noticable, and the baseline stuff is at a nice (slow to medium) speed.
The small reduction from full throttle having good resolution is
important, because you do not need full throttle to fly P05 (only after
the upline snap). </font>
<br>
<br><font size=2 face="sans-serif">The power side of the equation is close
to "set", however, the Impact has some interesting characteristics
to get use to. The timing on snaps and spins is different than I
am used to, due to (what I believe) are heavy wing panels. It would
be interesting to know if someone has cut foam cores for this model yet....
This also gives a "wallowy" look, if you fly too slow which
is all to easy to do with the E-setup. Although the general flight
is definitately slower than with a glow setup, you need to still set the
plane in a speed envelope where it "flys" its best. Also,
I did not recognize during the build process that the vertical fin has
right thrust built into it. During building, I added a smidgen more R-thrust,
and this will now need to be removed. However, the tip of the rudder
counterballance is 3/16" off center of the vertical fin, so I don't
think this amount of offset is entirely due to my little extra R-thrust.</font>
<br>
<br><font size=2 face="sans-serif">CG: Mine is flying around 35 mm
ahead of the recommended range, and still a little tail low. It is
not squatting through radius anymore, and still seems to fly light in the
pitch axis. Mixes: only 2% down elevator to low throttle. Although
I'm still fiddeling with the tracking (rudder trim, wing weight), it seems
very close, and no other need for mixing has been blareling obvious yet.
In regards to CG, try not to get caught up in "simple"
tests (or the trim chart) or relative prior experience. Continue
to play with the CG until the plane is flying better.</font>
<br>
<br><font size=2 face="sans-serif">Thanks,</font>
<br><font size=2 face="sans-serif">Jim W.</font>
<br>
<br>
<br><font size=2 face="sans-serif"><br>
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