From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: EC3 debugging. Code wanted.
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-364420@logan.com>
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Date: Sat, 13 Jun 2020 09:04:44 -0400
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Tracy retired for real some years ago. He made all the PSRU specs and 
EC/EM programming public domain. He's been tinkering with SpeedUnio, but 
nothing serious.
I got an EC3 board from him and sort of figured I would learn the 
program and maybe be able to provide some support for it. Turns out to 
be tougher and time consuming than I thought. I'm not really a motor 
head like Tracy. He can listen to an engine running and pretty much 
diagnose what's going on.
Tracy's thinking that getting some of the SpeedUnio boards and 
TunerStudio would be a lot easier for someone to work with. Yeah, one 
would have to add some relays to switch between the boards (if want 
redundancy) and add mixture tuning to the SppedUnio software. The EC3 is 
just more convenient (if programmed correctly).

RV-8 repairs were almost complete last time he was in Colorado but Van's 
had sent the wrong skin. By the time he got the right one it was time to 
head back to Shady Bend.

Finn

On 6/13/2020 2:10 AM, Todd Bartrim bartrim@gmail.com wrote:
> Hi Finn;?? I'm sorry I can't help you with the code, but how is Tracy? 
> He's been off-line since after his RV8 accident but I'm quite curious 
> how that rebuild is going.
> I'll always regret never making it down to the Rotary Roundup at Shady 
> Bend. I always figured there was always next year. Until there wasn't. 
> So I think once this whole current mess is behind us I'm going to make 
> every effort to make it down to the fly-in at Slobovia Outernational 
> and meet a few other rotorheads, to see what they're doing.
> ?? But tell Tracy that his presence??on the list is missed and we'd 
> appreciate some updates on his rebuild, even if they are not yet 
> rotary related. Any plane that is powered by a rotary is of interest 
> to me even if he's still doing airframe repairs.
>
> Todd Bartrim
>
>
> On Fri, Jun 12, 2020 at 3:46 PM Finn Lassen finn.lassen@verizon.net 
> <mailto:finn.lassen@verizon.net> <flyrotary@lancaironline.net 
> <mailto:flyrotary@lancaironline.net>> wrote:
>
>     Yesterday Tracy took pity on me and came down and did some
>     troubleshooting.
>
>     At first listen he said it sounded like I was only running on one
>     rotor.
>     We ruled that out by disconnecting power to rotor 1 coils, then
>     rotor 2
>     coils. Engine didn't stop.
>
>     Tracy said it sounded like timing was way late - not the sharp pop
>     he'd
>     expect from the rotary exhaust. (I would never have heard that).
>
>     Rechecked CAS wiring - OK.
>
>     Found and marked TDC on starter ring gear with white paint in between
>     two teeth, and put on a timing light. Timing was off and random to
>     the
>     point he only got a glimpse of the mark once.
>
>     He thought he heard it run right once at very low RPM when I
>     pulled back
>     on throttle to shut down.
>
>     I removed the EC3 and he took it home. He confirmed that at very low
>     idle RPMs it works right (timing is calculated differently there)
>     but at
>     higher RPMs coils never got the signal to fire! Only reason they
>     fired
>     at all is safety built into coils (and EC3) that fires themselves
>     after
>     max allowed dwell time.
>
>     He gave me a couple of hardware changes to make: clamping circuit
>     on CAS
>     input and shorting a diode from A supply to the Vcc3 supply. Doubtful
>     that they will handle my issue.
>
>     So now it's up to me to debug the program. We verified the essential
>     configuration bits. He lent me an Arduino based RX-8 CAS simulator
>     (I'll
>     post info on how to make your own later.)
>
>     The lazy person's (me) way to find out what changed is to compare the
>     source code from when it last worked (for a Renesis) and the current
>     source code.
>
>     If anyone has a copy of the EC3CL8.ASM file from several years ago, I
>     would appreciate it.
>
>     However, it's probably not a bad idea to have someone other than
>     Tracy
>     who's also familiar with the EC3 program. So I might as well dig in.
>
>     I'll keep you briefed on what we find.
>
>     Finn
>
>
>     --
>     Homepage: http://www.flyrotary.com/
>     Archive and UnSub:
>     http://mail.lancaironline.net:81/lists/flyrotary/List.html
>


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    <div class="moz-cite-prefix">Tracy retired for real some years ago.
      He made all the PSRU specs and EC/EM programming public domain.
      He's been tinkering with SpeedUnio, but nothing serious.<br>
      I got an EC3 board from him and sort of figured I would learn the
      program and maybe be able to provide some support for it. Turns
      out to be tougher and time consuming than I thought. I'm not
      really a motor head like Tracy. He can listen to an engine running
      and pretty much diagnose what's going on.<br>
      Tracy's thinking that getting some of the SpeedUnio boards and
      TunerStudio would be a lot easier for someone to work with. Yeah,
      one would have to add some relays to switch between the boards (if
      want redundancy) and add mixture tuning to the SppedUnio software.
      The EC3 is just more convenient (if programmed correctly). <br>
      <br>
      RV-8 repairs were almost complete last time he was in Colorado but
      Van's had sent the wrong skin. By the time he got the right one it
      was time to head back to Shady Bend.<br>
      <br>
      Finn<br>
      <br>
      On 6/13/2020 2:10 AM, Todd Bartrim <a class="moz-txt-link-abbreviated" href="mailto:bartrim@gmail.com">bartrim@gmail.com</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-364420@logan.com">
      <meta http-equiv="content-type" content="text/html; charset=utf-8">
      <div dir="ltr">Hi Finn;?? I'm sorry I can't help you with the code,
        but how is Tracy? He's been off-line since after his RV8
        accident but I'm quite curious how that rebuild is going.
        <div>I'll always regret never making it down to the Rotary
          Roundup at Shady Bend. I always figured there was always next
          year. Until there wasn't. So I think once this whole current
          mess is behind us I'm going to make every effort to make it
          down to the fly-in at Slobovia Outernational and meet a few
          other rotorheads, to see what they're doing.</div>
        <div>?? But tell Tracy that his presence??on the list is missed
          and we'd appreciate some updates on his rebuild, even if they
          are not yet rotary related. Any plane that is powered by a
          rotary is of interest to me even if he's still doing airframe
          repairs.</div>
        <div><br>
        </div>
        <div>Todd Bartrim<br>
          <br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Fri, Jun 12, 2020 at 3:46
          PM Finn Lassen <a href="mailto:finn.lassen@verizon.net"
            moz-do-not-send="true">finn.lassen@verizon.net</a> &lt;<a
            href="mailto:flyrotary@lancaironline.net"
            moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Yesterday
          Tracy took pity on me and came down and did some
          troubleshooting.<br>
          <br>
          At first listen he said it sounded like I was only running on
          one rotor. <br>
          We ruled that out by disconnecting power to rotor 1 coils,
          then rotor 2 <br>
          coils. Engine didn't stop.<br>
          <br>
          Tracy said it sounded like timing was way late - not the sharp
          pop he'd <br>
          expect from the rotary exhaust. (I would never have heard
          that).<br>
          <br>
          Rechecked CAS wiring - OK.<br>
          <br>
          Found and marked TDC on starter ring gear with white paint in
          between <br>
          two teeth, and put on a timing light. Timing was off and
          random to the <br>
          point he only got a glimpse of the mark once.<br>
          <br>
          He thought he heard it run right once at very low RPM when I
          pulled back <br>
          on throttle to shut down.<br>
          <br>
          I removed the EC3 and he took it home. He confirmed that at
          very low <br>
          idle RPMs it works right (timing is calculated differently
          there) but at <br>
          higher RPMs coils never got the signal to fire! Only reason
          they fired <br>
          at all is safety built into coils (and EC3) that fires
          themselves after <br>
          max allowed dwell time.<br>
          <br>
          He gave me a couple of hardware changes to make: clamping
          circuit on CAS <br>
          input and shorting a diode from A supply to the Vcc3 supply.
          Doubtful <br>
          that they will handle my issue.<br>
          <br>
          So now it's up to me to debug the program. We verified the
          essential <br>
          configuration bits. He lent me an Arduino based RX-8 CAS
          simulator (I'll <br>
          post info on how to make your own later.)<br>
          <br>
          The lazy person's (me) way to find out what changed is to
          compare the <br>
          source code from when it last worked (for a Renesis) and the
          current <br>
          source code.<br>
          <br>
          If anyone has a copy of the EC3CL8.ASM file from several years
          ago, I <br>
          would appreciate it.<br>
          <br>
          However, it's probably not a bad idea to have someone other
          than Tracy <br>
          who's also familiar with the EC3 program. So I might as well
          dig in.<br>
          <br>
          I'll keep you briefed on what we find.<br>
          <br>
          Finn<br>
          <br>
          <br>
          --<br>
          Homepage:?? <a href="http://www.flyrotary.com/"
            rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.flyrotary.com/</a><br>
          Archive and UnSub:?? ??<a
            href="http://mail.lancaironline.net:81/lists/flyrotary/List.html"
            rel="noreferrer" target="_blank" moz-do-not-send="true">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><br>
        </blockquote>
      </div>
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