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Message-ID: <4B14443B.9040300@gmail.com>
Date: Mon, 30 Nov 2009 17:16:27 -0500
From: Steve Brooks <cozy4pilot@gmail.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: First start on new engine - sort of.....
References: <list-3995867@logan.com>
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> Very little diagnostic info in message Steve.
> Same questions as usual:
A & B same?  I did try both controllers and they were the same   Mixture 
knob make any difference when running?  Yes - It would only run when set 
rich  - 3 o'clock position - It died after 2 or 3 seconds when I turned 
it to 12 o'clock.
  I also reset mode 1 2 4 and 8 to default before the last run.  no change
> Either Coil disable (leading/trailing)  make any difference?  I didn't 
> try this 
   Exhaust temp is better indicator of dead rotor.  EGTs the same?  I 
didn't look at this while it was running - still not too familiar with 
the EM3, nor have I confirmed that EGT is working.
> Would engine respond to throttle when running?  What rpm did it run 
> at?  Yes - It responded to throttle.  I don't know what RPM exactly, 
> but I'd guess it was about 2500 RPM.  When I tried to throttle it 
> down, it died.
>
> Zero rpm indicates that primary injector is not firing.  (The one that 
> the EM2 is hooked to).
> RPM during cranking indicates that you are getting pulses then.  Sure 
> EM2 is not hooked to secondary injector? (which would fire during 
> cranking due to high MP)  - I suspect that you are correct.  I will 
> have to verify that it is connected to rotor 1 primary.
I was reviewing the EM-3 connections in the manual, and I have a 
question.  AQM TB4-13 - I have it connected to the display pin 17, but I 
also see that it is labeled as VSS/Ground.  Should I have also connected 
this to ground near the AQM ?  The drawing on page 12 of the EM-3 manual 
shows it as just running between the AQM and display.

Steve
>
> Tracy
>
> On Mon, Nov 30, 2009 at 12:30 PM, Stephen Brooks <cozy4pilot@gmail.com 
> <mailto:cozy4pilot@gmail.com>> wrote:
>
>     I started the new engine this weekend, after getting the
>     intermittent spark issue resolved, only to discover that I have
>     some other issue.
>     When I tried to start the engine, it popped several times on
>     successive turns, but wouldn't start.  After trying several times,
>     I did get it to start, but it seemed to only be running on one
>     rotor.  It died after 10-15 seconds, and I could not get it to
>     restart, so I pushed it back inside and charged the battery.
>
>     I tried it again yesterday, and had a very hard time getting it to
>     start.  It finally started, and I ran it for about a minute.  It
>     ran very rough, and felt to me like it was running on only one
>     rotor again.  After shutting it down, I felt both rotor housings
>     to determine which one was running, and I was surprised that both
>     felt the same temperature.  I suppose that this means that it was
>     running on both rotors, but very rough, and not much power.  Both
>     were warm, but definitely not hot after only a minute or so of
>     running.
>
>     I get a consistent popping when cranking it over, that feels like
>     the timing is way off.  I double checked the static timing and
>     verified it was 35 BTC.  I tried moving it to about 25 BTC, and
>     while I did not get it to start, the popping was the same.
>
>     I also verified that the injectors were wired correctly, by
>     checking each one from the EC-2 connector.  The injector
>     diagnostic, and ignition diagnostic check fine.  The only thing
>     that I noticed that was odd was that while cranking, the EM-3
>     showed RPM (250-300), but while running it was reading zero.
>
>     It has been several months since I've added any fuel, so I was
>     thinking of draining the fuel tank, and putting in some fresh
>     fuel, but I suspect that is not the issue.
>     It seems to me that the timimng is way off or something.
>
>     Steve Brooks
>
>
>