Owner manual

For Your Safe Flight Page 21
Rich of Peak leaning is as simple as:
A. Pre-lean your mixture.
B. Tap the LF button (verify ROP appears).
C. Lean mixture until LEANEST flashes (peak found).
D. Enrichen to the desired value ‘Rich Of Peak’.
R
Procedure
Scanner Example
(one engine)
Comments
1
Establish cruise at 65
to 75% power.
2
Pre-lean the mixture
to 50°F estimated rich
of peak on any EGT:
_________°F.
EGT
1490
CHT 370
*
See ‘Pre-leaning’
3
Wait one minute Let engine stabilize.
4
Tap the LF button
ROP
Start LeanFind (if LOP
appears hold STEP & LF until
ROP appears)
5
Lean the mixture at
approx. 10°/second
without pausing.
EGT
1520
FF 13.8
Flashing cylinder I.D. box
identifies that EGT increased
at least 15°F. EDM is now
looking for first EGT to peak.
6
Stop leaning when
a column begins
flashing. You will see
LEANEST for one
second, followed by:
EGT
1545
FF 12.4
Flashing cylinder I.D. box
AND its column indicates
leanest cylinder. Due to
thermal inertia this will usually
be about -15°F down the lean
side of peak.
7
If you hold PEAK, the
values of EGT and FF
when peak was found
are displayed.
EGT ↑
1560
FF 12.9
Captured peak EGT value and
peak FF are displayed.
8
If you tap PEAK, the
difference from peak
EGT is shown. Tap
again to return to the
peaked EGT value.
EGT∆
-90
FF 13.4
A useful mode for setting
mixture the desired degrees
rich of peak - no math
required! NOTE: Unit
remembers view last used.
9
Slowly enrich the
mixture noting that
EGT is returning to
peak. Stop enriching
at the desired EGT.
‘Peak’: best Econ.
‘ROP’ target: best
power.
EGT 1560
FF 12.9
EGT
1460
FF
13.6
(100º RICH OF PEAK)
Rich of Peak target
leaner
richer
‘FF’
EGT
1560
Peak
-100
1460