flyrotary@lancaironline.net Mailing List Archive

That is very interesting, Bill.

I have never tried in the air so can't compare. I have done my timing messing around on the ground and my impression was just the opposite. I had a hard time telling any change even shifting from least retarded to most retared position. I finally convinced myself that three clicks forward from the center (default) postion or 8 clicks up from the greatest retard postion gave me a bit more rpm. I don't recall looking but I don't have any impression that it changed EGT at all.

Now, I am trying to recall if I tried that before Tracy informed me of an error in the wiring diagram that in effect shorted out all modes above mode 3 or not or after I fixed the wiring (It would make a wee bit of difference). Now when I was doing it - my MAP was closer to 29" sitting on the ground with WOT at 5300 rpm. At altitude or less than WOT perhaps I would have noticed similar things that you did.

Sure sounds like something is not quite right. I wouldn't expect that much change with just one click. But, clearly that is something I think you should ask Tracy about. If that is normal, then people need to be aware so heart attacks may be avoided {:>).

Sorry, I couldn't be of more help.

Best Regards

----- Original Message -----

From: Bill Eslick

To: Rotary motors in aircraft

Sent: Tuesday, September 23, 2003 12:07 PM

Subject: [FlyRotary] Tuning the EC2

I need a little help here with this Mode 8 stuff. Ed, I did some tweeking at cruise today to check the timing, and then I remembered why I quit trying last time!

Testing was done at 4000 MSL, 80F, 4800 RPM, about 23 inches MAP.

I get absolutely no change of anything in the "increase" direction. In the "decrease" direction, just one click gives me a drastic 2 GPH drop in fuel flow, and the EGT shoots up with a noticeable loss of power. More clicks in that direction change nothing. No matter how many clicks I go toward the "decrease", it only takes one click back to the right to restore the original condition and more clicks to the right change nothing.

Am I going nuts here, or what???? I did it several times at different RPMs, etc, and always got the same sort of results. It is like a two-position toggle marked "good/bad"! I have checked the static timing previously, and it is right where the instructions say to put it.

Ideas????

Bill Eslick

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