Interesting this has come up. Our trim has always been near the bottom of the
indicator in cruise. I assumed it was because we usually traveled with Jethro,
a 50 pound dog in the rear. But after Jethro died, we adopted Finn who is only
20 pounds. The trim still is near the bottom which confirms the operation
is correct.
I verified the tailplane trim tab relationship like Pete Z and all is well. The
change in CG between 50# and 20# isn't much so it all makes sense.
I haven't verified, but I understand that the trim motor runs further than the
indicator, ie you have more down trim available after the indicator is at the
bottom.
I use the trim indicator a lot. The "0" or middle position trims the plane for
about 65 kts with gear extended. That is the takeoff configuration. During
landing
I set the trim to one or two lines above the "0" position which results
in about 55 -60 kts with gear extended. With the speed set, I control rate of
descent with power. It works nicely.
Jim & Heather
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