Cessna Skyhawk Owner's Manual page 14

FUEL SYSTEM
SCHEMATic
TRUE AIRSPEED INDICATOR
A
true
airspeed indicator is available
to
replace
the
standard
air-
LEFT FUEL TANK
RIGHT FUEL TANK
speed
indicator in your airplane. The
true
airspeed indicator
has a cali-
brated
rotatable ring which works in conjunction with
the
airspeed
indi-
cator dial in a manner similar
to the
operation of a flight computer.
VENT
I
-
TO
OBTAIN TRUE AIRSPEED,
rotate
ring until pressure altitude
is aligned
with outside air
temperature
in degrees Fahrenheit. Then
read
true
airspeed
on rotatable
ring
opposite airspeed
needle.
NOTE
Pressure
altitude
should
not
be confused with indicated
SELECLVOER
altitude. To obtain pressure altitude, set barometric
scale on altimeter
to "29.92"
and read pressure altitude
on altimeter. Be sure
to
return altimeter barometric
scale
to
original barometric
setting after
pressure
alti-
tude
has been obtained.
ENGONE
STFRUA
R
ENGINE
PRIMER
CODE
FUEL TANK
QUICK-DRAIN
VALVE KIT
FUEL SUPPLY
VENT
Two fuel
tank
quick-drain
valves and a fuel sampler
cup are available
---
MECHANICAL
CARBURETOR
THROTTLE
as a kit
to
facilitate daily draining and inspection of fuel in
the
main
tanks
LINKAGE
for
the
presence of water
and sediment. The valves replace existing fuel
tank
drain plugs located at
the
lower
inboard
area
of
the
wing. The fuel
MIXTURE
sampler
cup, which
may
be stowed
in
the
map compartment, is used
to
TO CONTROL
drain
the
valves.
The sampler cup has a probe in
the
center of
the
cup.
ENGINE KNOB
When
the
probe is inserted into
the
hole in
the
bottom of
the
drain valve
and pushed
upward,
fuel flows into
the
cup
to
facilitate visual inspection
of
ghe
fuel. As
the
cup
is removed,
the
drain valve seats, stopping
the
Figure
2-2.
flow of fuel.
2-2
6-5