Rich,
A
wideband O2 meter is
your best friend. Get a PLX device O2 if you don’t have one. It
will support Wideband or Narrow Band outputs to your EC3.It
will shorten you tuning time and give you a hard number to look at during
tuning and flight operations.
These
are my power settings and EGT’s. EGT location makes a big difference.
EGT numbers are ball park with probes located 2.5” -3” from
header.
Take
off Power – Target 12:7:1 F/A – EGT
typically
under 1675F at 38”MP
/
7000
rpm.
Best
Power – target 13.5:1 F/A –EGT’s
typically
under 1600F below 30” MP
Complete
fuel burn– target 14:7:1 - Produces hottest EGT’s . I have seen up to
1700 F+ at high power settings at
less than 30” MP so
be careful.
Lean
operation with power loss – Target 15.8:1 or lower. Power drops
dramatically. I see EGT’s between 1475F and 1525 F depending on engine
rpm.
Stay
away from 14:7:1 F/A except for ground and low power flight.
Bobby
Hughes
From: Rotary motors
in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Wednesday, December 07, 2016 1:59 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Gonna be a lean year or
which way do I lean
Greetings
fellow roteryophiles.
I
am about to overhaul my renesis and in an effort not to destroy the thing,
as I use it, I have a leaning question.
It
is normally aspirated with an RD1-C box
Using
Tracy's EC-3 (or is it the em or rc-- whatever) what is a safe leaning
procedure.
Is
it suggested to run these things LOP, ROP O(n)P or just go for smoothness
at any fuel burn?
My
understanding is to run the beast full throttle and control the power output
by the RPM (IVO prop--ughish)
Of
course my concern is with detonation and destruction of the apex seals since
they, at certain parts of the rotation, from my reading, show a longer face
to the chambers.
Someone,
please help me so I don't have to restrict my carnivorous activities to
"lean" meat.