LOONEY
@-
OWNERS
MANUAL
ED
RAM
AIR
PULL
ON) is set for ram
air
and the gear
is down. When operating at full throttle, using ram air
will increase the manifold pressure by allowing engine in-
duction air to bypass the induction air filter. The use of
ram air must be
linjited to clean, dust-free air at altitude.
The engine will operate on direct unfiltered
air
when the
induction air control knob
is
pulled aft. The amber caution
light reminds the pilot to push the engine induction
air
con-
trol forward for filtered
air
before landing. Should the in-
duction air filter clog, alternate
'
air will automatically
draw into the engine. A spring-loaded door in the induc-
tion system will open by induction vacuum to allow
air
to
enter the engine from inside the cowling.
\All engine instruments except the EGT gage are grouped in
the right instrument panel. Color arcs on instrument faces
mark operating ranges. Proper interpretation of engine in-
strument readings
is
essential for selecting optimum con-
trol settings and for maintaining maximum cruise fuel eco-
nomy. Engine limitations are given in Section
V.
9
IGNITION SYSTEM
The
left
magneto has a set of fixed-retard breaker points
that aid in smoother, easier starting.
A
battery-powered
starting vibrator supplies
a
long- duration boosted spark.
The starter-ignition switch, mounted on the left of the in-
strument panel, combines both ignition and starting func-
tions. Turning the ignition key clockwise through
R,
L,
and BOTH to the START
MAG
position and then pushing
forwardon the key and receptacle engages the starter. Re-
leasing the key when the engine starts allows the switch to
return by spring action to the BOTH position. For safety,
the starter-ignition switch must be left at
OFF
when the
engine
is
not running.
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