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Lou,
I've been using the EM-2's tach feature. It seems to be right on the money. I had trouble getting a good reading out of the BMA E-1, jumping all over the place, and gave up on it for the time being. Now, I've decided that I'll try to get a prop rpm input from the M/T controller to display on the BMA. I'll let you know how that turns out when I get around to doing it.
As for tuning, I too have been fighting to get a smooth idle. It just doesn't seem to smooth out like I know it should down around idle. I was getting a high EGT reading on #1 rotor and so I pulled the injectors and had them all cleaned. After reassembly, the high EGT reading was still there. Turned out to be a bad EGT sensor. I'm still trying to determine if it is the sensor or the wiring to the EM-2. Once I get that ironed out, I'll attempt to get the EM-2 to do an auto-tune. Hopefully, once that's done she'll be purring like a kitten, even at idle. One thing I've noticed is that whenever I run it, it always draws a crowd.
Mark S.
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From: Rotary motors in aircraft on behalf of lou rubin
Sent: Sun 1/14/2007 1:19 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] tachometer recommendation
What tach would be compatable with a 20 B ?We were
using the blue mountain for engine speed ,however the
unit had to be on for the engine to run smoothly. Im
wondering if the 20B would be a different pulse rate
then the 13B
Lou
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