.
Because the rotary has two injectors per rotor
and they are staged (see Mode 7 for details on staging), it is possible that
the mixture
might be miss-matched
differently when staged or not staged. You may have to match the EGTs
once when the engine is staged
(low power) and again when not staged (high
power).
So it appears that the EC2 has had the capability
to adjust the different in flow rates across the staging event since at least
2006. But, perhaps like many others, I was not certain what
conditions would signify this needed adjusting (until Steve's data
and analysis) and therefore never attempted any adjustment (my
dumb!) - my philosophy being if it is working well and you don't have a
clue as to what/why you are adjusting something - then DON'T!
{:>)
The only "problem" (actually more of an irritant
than a problem) I have ever encountered using the EC2 was the staging
"bog" I would encounter while operating on the ground which I finally
eliminated. What I did was to enrich the fuel MAP in the 3-4 bins
in the High MAP region that the engine point jumped to after
staging. This did solve my staging bob - but, after reading the
EC2 instructions again, I can see that if I probably should have used Mode 6
to accomplish this as my adjustment was just for 3-4 bins and not all
bins.
Once again Tracy has addressed the need in
the Ec2/3 - but, I just failed to understand the function (and
conditions) it might have addressed. Now that Steve has clearly shown
there is a high probability that adjusting the staging flow rate will result
in more accurate fuel totalizer values and other fuel factors, I can now
see a reason to use mode 6.
Thanks, guys - discussions on this list is
generally always educational and helpful
Ed