You certainly have it right about the
better understanding part! :>)
So, since it has no effect, why, in step
1, do you say, “with the engine running below the staging point, select
mode 6 and turn the program knob slightly to the left of the 12:00 oclock
position and press the program store switch”???
Is this some kind of arming step??
The mixture is really rich before I start
this step. I have the mixture control knob at probably 9:00 oclock on
both sides of 15” of map. Is this going to have an effect on
that? Or is it just in case the mixture changes when you go from below 15
to above 15?
With the 4 yellow injectors, where do you
recommend the staging point be set? I have it set now at 15 mostly so I can
do stuff like this without running at high power and causing ground cooling
problems. If I get every thing set and then later change the staging
point, will this cause a need for a do over?
I will clear and start over. When would
be a good time to call if need be?
Thanks for the response that helps to
clear it up.
By the way, to those carb guys, this is a
little confusing, but no way bad enough to justify going with a carburetor!!!
Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of Tracy Crook
Sent: Saturday, April 24, 2010
11:17 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: getting
lost in the tuning process
"Next is Secondary Injector Differential adjustment,
Mode 6. First I cleared the large secondary mode. Then I tried to
get the mixture mid range at <14”. Then I tried to get the mixture
mid range at <14”. This required a lot of leaning on the mixture
knob. Same for above 16”. So I turned the program knob to the
right and hit store several times. "
I think you need to get a better understanding of how the various modes work
and what the direction of change will be. If you need the mixture to be
Leaner, why would you turn the Program knob RIGHT? (Right = RICH,
Left = LEAN)
Also note that Mode 6 will have NO effect on the mixture if you are below the
staging point (which you no doubt were at a MP of 14") It only
affects the mixture above the staging point, ie, when the SECONDARIES are on.
Next, hitting the Store button multiple times will have no effect in Mode 6
unless you CHANGE the position of the program knob before you hit Store.
Tracy
On Sat, Apr 24, 2010 at 10:57 PM, Bill Bradburry <bbradburry@bellsouth.net>
wrote:
I was working on tuning today and I seem to be getting lost.
I have the Renesis and I recently changed my injectors out from the
Red/Blue to all 4 yellow. These are larger than the Red primary, but
smaller than the blue secondary. The total flow is close to the same for
both.
First thing I did was check fuel injector flow rate, Mode 3.
Between 22 and 26” of manifold pressure that they maintained good mixture
with the mixture knob in the center. So far, so good.
Next is Secondary Injector Differential adjustment, Mode 6.
First I cleared the large secondary mode. Then I tried to get the mixture
mid range at <14”. This required a lot of leaning on the mixture
knob. Same for above 16”. So I turned the program knob to the
right and hit store several times. Soon I could move the manifold
pressure back and forth over the staging point and the engine ran smoothly.
But then I found that I could only run the engine at high power
with the mixture knob all the way lean!??? Did I do something
wrong? How did this happen?
I think I am lost. I don’t really understand what I am
trying to accomplish with the mode 6, and when I ever get to mode 2, I am going
to really be up the understanding creek.
Anyone who would like to enlighten me would be appreciated.
My current plan is to clear it out and start over from the
beginning again tomorrow.
Tracy’s instructions kind of make me think that he is expecting
the mixture to go rich. My problem is that it is rich to begin with and
doesn’t seem to really change that much.
Thanks for the assistance!
Bill B