Ed, You are good at
this kind of thing..
The Renesis primary
(red) injectors are 295 cc/min flow rate. At say, 80% duty cycle, what HP
would these injectors support if you moved the staging point to higher
RPMs?
Bill
B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of sboese
Sent: Wednesday, February 18, 2009 12:07
PM
To: Rotary motors in aircraft
Subject: [FlyRotary]
staging
Tracy and
all,
Looking back at the
data I was using when thinking about my “staging bog”, I realize that the
manifold pressures I am looking at are values I calculate from the EC2
data. My conversion to units of inches Hg may not be correct. Either
my EC2 manifold pressure sensor may have changed calibration or I may have never
had this conversion correct to begin with. I have only one program to do
this and may not have it right. How Tracy keeps track of all the versions of EC’s
is beyond me.
In any case, I can NOT
say with certainty that my EC2 is internally inconsistent as I stated in my
previous message. I apologize if this has caused you to waste any of your
valuable time and energy over this.
The reason I am
concerned with staging more than many others might be is that at the ground
level density altitudes of my home airport, the maximum manifold pressure I see
is about 23 inches and of course it gradually drops off from there as I
climb. This results in staging taking place during critical flight
regimes. Encountering an extended “bog” right after take off is not my
idea of fun. If I cannot get the staging to work well using mode 6, I am
considering David Leonard’s suggestion of moving the staging point to a higher
manifold pressure where I will not normally encounter it. In my case this
is need not be much of a change. The manual indicates that some modes are
active only when the engine is running. Is this the case with mode
7? I’m trying to make sure I can set the staging point with a pressure
source other than the engine.
This does generate the
potential for my next trip to lower altitudes to be memorable. I just have
to remember that this is venturing into unknown territory again and that full
throttle operation may not be reliable until tuning at the higher power settings
accessible at lower altitudes has been
accomplished.
Again, my apologies to
especially to Tracy and also the rest of
you.
Steve
Boese