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Date: Sun, 28 Jun 2009 03:51:10 -0500
From: Christopher Barber <CBarber@TexasAttorney.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: More progress, more questions....
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Bill,

I think you are correct about the tach and the secondaries.  I had it do 
it again today when I was running only the secondaries.  The rpm was 
about 2000 revolutions faster when I shut off the primaries.

Today was spent replacing the 20 awg with the 16 awg that is mentioned 
in the manual.  I also cleaned up some other wire issues resulting from 
me separating the coil/injector wires from the EC2/EM2 wires.

Ed,

Thanks, seems you nailed it when you mentioned my oxygen sensor not 
being grounded properly causing the mixture bar to be erratic, now it is 
amazing how sensitive it seems. You were correct about a gasket that may 
be preventing a proper ground by the exhaust manifold, so I ran a wire 
clamped the the sensor to the ground block.

I still feel progress is being made, but I still seemed to be plagued by 
inconsistencies.  Tonight, I was tuning at lower settings and things 
seems to be going as expected.  I decided to ramp up the power and when 
I did the engine started sputtering and not developing power above about 
3400 rmp.  Came back to idle and it smoothed out, added power and more 
stumbles.  Damn.  I shut it down, restarted and it had gone away.  I 
went to WOT and the power came on amazingly up to about 6200 rpm...and 
it felt like it.  Since my temps were doing ok, I  kept it at full power 
for about 20 seconds or so when the rpm dropped about 400 rpm to 5800.  
I did nothing to cause the change.  I then started to fiddle with the 
mixture but it did not make a difference in bringing the power back.  
Hmmmm? Shut down, restarted and it did the same thing. Hmmm? Hmmmm?

Also, twice I had the engine want to stall when I cut the primaries.  A 
shut down and restart had it come back on line again.  Sigh, I cannot 
even count how many times I have rechecked connections and wires.

I am having continued problems with my charging system, so I will try to 
focus on this for now as it could be a base cause of some of these 
concerns.  Al, spotted my low volts and I was aware of it but focusing 
on other issues until my EE buddy can come out.  What he will be able to 
detect and help correct would likely take me weeks, if I ever found 
it....since I have not as of yet.

Most of today was spent with mundane issues (like better wire runs)  and 
folks stopping by the hangar.  Also, having to try to put in perspective 
a very well educated engineering type from another list who emailed me 
and trashed the rotary and the EC2, in what I believe a well meaning, 
but very, very harsh manner.  I value the concern and knowledge however, 
he blamed my problems on the rotary etc, while I have seen most my 
issues being something that could have happened with what ever engine I 
was learning about.  It shook me in its tone and message, even if I do 
not agree....however, since I do not wish to have my head in the sand, I 
do not take a well educated persons mindful opinion lightly.

As always guys, thanks for reading and  putting your minds together for 
the common good.

All the best,

Chris


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