flyrotary@lancaironline.net Mailing List Archive

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 -----

From: Mark Steitle

To: Rotary motors in aircraft

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