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From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
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Subject: RE: [FlyRotary] More progress, more questions....
Date: Sat, 27 Jun 2009 10:42:24 -0400
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I assume that is your prop I see sticking up behind the temp gage picture???
:>)

Bill B 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Christopher Barber
Sent: Saturday, June 27, 2009 2:40 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] More progress, more questions....

Back out at the hangar today and some real progress made.

Even though I am still having to "pump" the throttle to get the RPM down
after having the throttled advanced, I do have the rpm and manifold pressure
down.  I cannot find a leak, HOWEVER, when y'all (Bill I think) mentioned my
new injectors it dawned on me that I installed the new injectors and then
cranked it pretty much right up to see if it would even start.  From there I
started playing with it.  I had meant to reset everything and start anew.
However, I got caught up in the process and never got back to a base.  So,
today I reset the EC2 to the factor setting and started it up and it ran
even better.  Did the Mode 3 (at 22 inch manifold pressure), 6, 2, 1 thing.
The engine is running better than ever.  I have the manifold pressure in the
12 range.

I am concerned about some sputtering that is present around idle.  It is
generally pretty smooth, but sputters too. Not sure what is causing it yet.
Thoughts?

I still have some inconsistencies.  Today, I was running the engine at idle
and everything seemed fine. It was idling at about 1500 rpm.  I looked away
and when I looked back, the rpm was reading about 3300 rpm.  
Nothing had changed and the engine was still running at idle but the rpm was
showing 3300, MP was 12.7.  I increased the throttle to see what would
happen and the rpm shoot up to 8000 rpm.  What the hell?  I kept playing
with the throttle and it continued.  I shut down and restarted and it
continued.  Shut down again and grabbed a soda, came back and fired it up
and it was showing normal again.  Hmmmmm?  I checked grounds but am not sure
which wire to check...guess the one for the tack, but it is difficult to
check when it goes away on its own.  DOH?  I will have to keep an eye on it.

Also, even when the MP is below 15 and the secondaries should not be on, if
I shut down the primaries the engine still runs.  Shouldn't it quit if I
turn off the primaries since the secondaries should not kick in until the
staging point?  Maybe this is too basic, but what am I missing.  Do the
secondaries turn on automatically if I turn off the primaries as a safety
featur????  It seems as if I may have read this somewhere, but I am not
sure. I know the switch to the primaries and secondaries are wired correctly
for the power and do not understand why they would run when power is
removed.

Next, in the documentation for the EC2, the diagrams and part of the text it
shows that most of the wires should be run using 22 and/or 20 AWG wire for
the connections.  However, in ONE place in the document it states that the
power wire to the coils should be 16 AWG.  Dang, I just rewired these down a
special conduit using 20 AWG.  Do I need to redo them with 16.  My concern
is whether the larger wire will fit down the tube.  I am not sure what is
the most current documentation (btw, they differences are in the same
manual)  Currently the 20 seems to be working well and I would prefer not to
have to change them again, however, I do not wish to have a potential
problem looming that surely will be easier to remedy now than later.  This
is about a 15 foot run in the Velocity. BOB?

Finally, for today anyway <g>, while my EM2 seems to be giving me good solid
data, I do seem to have a problem with my mixture indicator.  The little bar
graph jumps all over the place and gives me no real solid indication.  While
I am pretty good at tuning by ear, it kinda defeats the purpose to have this
great technology to be able to get some precise measures, if my key
indicator is not giving me what I need.  I have of course checked the wires
and even replaced the OXY sensor in the exhaust.  Thoughts.


Oh, a final comment on progress.  My cooling continues to impress me. 
The bigger rad/fan and oil cooler is able to idle and even take some power
for some amount of time allowing me to fiddle with things.  To REALLY
illustrate the point, take a gander at the attached jpeg showing the ramp
temperature this fine Houston afternoon....ok, in case you cannot open the
file, it was 112.5 on the ramp and 100 in the shade.  I was still cooling
<g>

Also, here is a shot of the weird RPM, being much higher than is should be,
with a low MP.


Thanks guys and gals.

All the best,

Chris