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Not too many oak trees at my airport, so I have
been tying it to my car. I know what you mean about it skipping over the
'reduced manifold' pressure, high rpm table values. Did you copy your A to
B or leave it as normal before your first flight? I pushed it to 5900 rpm today
for a short period, and it was trying to jump the chocks. maybe I need a less
stretchy rope.
I did have it in track mode, and the map moved as I
changed throttle setting, but the actual reading on the bottom row of MAP is
different than the second row. The map address is the same. i.e. address
77, 16.5 in the edit area, and 77, 17.4 in the EC-2 area.
positions 64 67 would be in the idle setting (10 to
11.5" manifold pressure) with rpm over 2800. I don't see how to get that on
the ground, too much prop load. Did I misinterpret?
Bill Schertz
KIS Cruiser #4045
N343BS
----- Original Message -----
Sent: Thursday, October 02, 2008 10:44
AM
Subject: [FlyRotary] Re: Question on EM-2
autotune
Bill,
Tie it to something solid, like a big oak tree. Personally,
I find that it is much easier to "auto-tune" in flight (at
altitude), but don't try it until you're very comfortable with the process and
have a working "B" controller in case things don't go as
planned. This was the only way I could get the EC-2 in the MAP address
range that is in play when preparing to land (abeam the numbers,
turning base, and turning final. As I recall, these were addresses 64 -
67. The EC-2 would skip over these when I would try to
tune this MAP range the ground. I simulated a landing
sequence while in auto-tune and was able to fix the tuning for
these addresses. Unless you can afford some time on a
dyno, "tie it to a big tree" is the best advice I can
offer.
Mark S.
87 hrs
On Thu, Oct 2, 2008 at 9:50 AM, Bill Schertz <wschertz@comcast.net>
wrote:
Thanks Mark, I will check it again on the next
engine run.
By the way, it gets a little hairy as you go up
in MP while the aircraft is tied down. The prop really pulls
hard.
Bill Schertz
KIS Cruiser #4045
N343BS
----- Original Message -----
Sent: Thursday, October 02, 2008 7:45
AM
Subject: [FlyRotary] Re: Question on
EM-2 autotune
Bill,
If the MAP address moves up and down with manifold pressure changes,
then it is tracking. If you're not in track mode, the MAP address
being edited is determined by the UP and DOWN buttons. Don't
forget to put it in mode 9 to activate the Auto-Tune feature.
As a side note, I had to set the program knob to about 3 o-clock
to get the tuning to come in to where I wanted it. At 12 o-clock it
was much too lean. Not sure why, but I'm sure that Tracy could
enlighten me.
Mark S.
On Wed, Oct 1, 2008 at 9:25 PM, Bill Schertz <wschertz@comcast.net> wrote:
Question for those operating a EC-2/EM-2 combination that have used
track mode and autotune.
According to my manual, to go into TRACK mode,
1. set mode 0 on EC2
2. Select EC2 MA{P table mode on EM2 (hold abort and pres ACK)
(this works)
3. Select TRACK mode (Hold UP button (1) and press DOWN (2),
Verify that EM2 MAP is tracking engine -- This is where I
have a question. From my reading of the manual,
LINE 1 and 2 show the MAP location being edited,
and in Track Mode,
Line 3 and 4 show the actual location the engine is running
at.
My question is that line 1 and 3 show the same value, I.e. the same
location in the MAP table, but lines 2 and 4 are showing different
values for the manifold pressure. For example,
MAP location 9 showed 14.5 on the line 2, and 16.0 on line 4.
This makes me wonder whether the Track mode is operating
correctly.
Any comments from those who have used this feature?
Bill Schertz
KIS Cruiser
#4045
N343BS
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