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Date: Mon, 30 Nov 2009 12:52:53 -0500
Message-ID: <1b4b137c0911300952u99e5a30l36aae17220309ec0@mail.gmail.com>
Subject: Re: [FlyRotary] First start on new engine - sort of.....
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Very little diagnostic info in message Steve.
Same questions as usual:

A & B same?
Mixture knob make any difference when running?
Either Coil disable (leading/trailing)  make any difference?
Exhaust temp is better indicator of dead rotor.  EGTs the same?
Would engine respond to throttle when running?  What rpm did it run at?

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)

Tracy

On Mon, Nov 30, 2009 at 12:30 PM, Stephen Brooks <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
>
>
>

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Very little diagnostic info in message Steve.<br>Same questions as usual:<b=
r><br>A &amp; B same?=A0=A0 <br>Mixture knob make any difference when runni=
ng?<br>Either Coil disable (leading/trailing)=A0 make any difference?<br>Ex=
haust temp is better indicator of dead rotor.=A0 EGTs the same?<br>
Would engine respond to throttle when running?=A0 What rpm did it run at?<b=
r><br>Zero rpm indicates that primary injector is not firing.=A0 (The one t=
hat the EM2 is hooked to).<br>RPM during cranking indicates that you are ge=
tting pulses then.=A0 Sure EM2 is not hooked to secondary injector? (which =
would fire during cranking due to high MP)<br>
<br>Tracy<br><br><div class=3D"gmail_quote">On Mon, Nov 30, 2009 at 12:30 P=
M, Stephen Brooks <span dir=3D"ltr">&lt;<a href=3D"mailto:cozy4pilot@gmail.=
com">cozy4pilot@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gma=
il_quote" style=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0=
pt 0pt 0.8ex; padding-left: 1ex;">
I started the new engine this weekend, after getting the intermittent spark=
 issue resolved, only to discover that I have some other issue.<br>When I t=
ried to start the engine, it popped several times on successive turns, but =
wouldn&#39;t start.=A0 After trying several times, I did get it to start, b=
ut it seemed to only be running on one rotor.=A0 It died after 10-15 second=
s, and I could not get it to restart, so I pushed it back inside and charge=
d the battery.<br>

<br>I tried it again yesterday, and had a very hard time getting it to star=
t.=A0 It finally started, and I ran it for about a minute.=A0 It ran very r=
ough, and felt to me like it was running on only one rotor again.=A0 After =
shutting it down, I felt both rotor housings to determine which one was run=
ning, and I was surprised that both felt the same temperature.=A0 I suppose=
 that this means that it was running on both rotors, but very rough, and no=
t much power.=A0 Both were warm, but definitely not hot after only a minute=
 or so of running.<br>

<br>I get a consistent popping when cranking it over, that feels like the t=
iming is way off.=A0 I double checked the static timing and verified it was=
 35 BTC.=A0 I tried moving it to about 25 BTC, and while I did not get it t=
o start, the popping was the same.<br>

<br>I also verified that the injectors were wired correctly, by checking ea=
ch one from the EC-2 connector.=A0 The injector diagnostic, and ignition di=
agnostic check fine.=A0 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 re=
ading zero.<br>

<br>It has been several months since I&#39;ve added any fuel, so I was thin=
king of draining the fuel tank, and putting in some fresh fuel, but I suspe=
ct that is not the issue.<br>It seems to me that the timimng is way off or =
something.<br>

<br>Steve Brooks<br><br><br>
</blockquote></div><br>

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