MOONEY
MODEL
M20J
gine operation and fuel burn than indicated fuel flow.
Therefore
it
is ls!com-
mended that the mixture be set using
EGT
as the primary reference rt~slead
of setting to a particular fuel flow.
The
Bollowing procedure
is
recornniended for setting cruise power and lean-
ing to best economy at
75%
power or less:
I.
AMer leveling off, set the manifold pressure and
WPM
for the desired cruise
power in accordance with the cruise power schedule on page
5-)o(.
At this
point, the
mixture control is at full rich from the climb.
6iv2
7
2.
Next, slowly move the rnixtur rol toward lean while observing the
EGT
indicator.
if
leaning the mixtrr
es the original manifold pressure sgt-
ting to change, use the throttle to in that desired cruise manifold pb-
sure and continue leaning until best economy setting is obtained.
PERFORMANCE
CONSIDERATIONS
RANGE
ASSUMPTiONS
Range
data
ciimb allowance is based on climbing at maximum continuous
power lo cruise altitude.
Range
reserves of
45
miriufes at cruise power have
been
allowed on Range
Data.
Other conditions
rised
in the Ranges shown
are
listed on each chart.
Wh@!l in level cruise flight with outside air temperatures
wgil
above standard
or when crc~ising
at
very
high
altitudes,
it
may be necessary to open the cowl
Slaps to keep engine temperatures in
the
normal operating range. Since the
cowi flaps
in
the
M20J
;lare multi-position, numerous open settings are avail-
abie to keep cylinder head and oil temperatures in the green arc under the
snost adverse cunditiorss.
Using the cowl flap's position indicator as
a
reference, the following cowl
flap's open positions are
given along with their effects on cruise speed:
Cowl flaps closed to cowl flap's indicator-
414
open, (Indicator positioned
at
first
index);
(approximate loss in
TAS)
.
. .
.
.
. .
.
2
Kts.
Cowl flaps closed to cowl flap's indicator-
1/12
open, (Indicator positioned at
second index);
(approximate loss in
TAS)
.
. . .
.
.
.
. 4
Kts.
REV.
B
6-4
2-87'
ISSUED
6-2-86
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