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BRAKES
Conventional toe-operated brake pedals
on the rudder controls give independent braking
on each wheel. (Differential Braking)
Since the wheels do not retract fully
into the nacelles, you have braking action on the
wheel even when retracted. Thus, when the DC-3
should make a belly-landing,it can still be steered
by the brakes just as if the gear were extended.
A parking brake control is fitted to the
lower section of the pedestal.
To apply parking brakes, pull the red
knob fully out. DO NOT APPLY THE
PARKING BRAKE WHEN ALOFT.
AUTOMATIC PILOT
The automatic pilot control box consists
of a directional gyro, ball bank indicator, bank
and climb gyro, horizon bar and a suction gauge.
It is on a panel in the center of the main
instrument panel.
The automatic pilot keeps your airplane in
straight and level flight by mechanical control of
the rudder, ailerons and elevator. Its use is fully
described in the section "CRUISE" later in this
manual.
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SUPERCHARGERS
Early series of the DC-3 have integral sin-
gle-speed blowers with an impeller ratio of 7.15
to 1. For higher altitudes, later series are fitted
with 2-speed, single stage blowers. These super-
chargers have an impeller ratio of 7.15 to 1 in low
blower and 8.47 to 1 in high blower.
The supercharger controls are mount-
ed in a quadrant on the left side of the pedestal.
They have yellow knobs.
To check for proper operation:
1. Prop controls .................INC.RPM
2. Throttles...........................1700 RPM
A minimum of 45 psi oil pressure is required to
operate the blower clutch. If oil pressure is low at
1700RPM, advance the throttles until oil pressure
reaches 45 psi.
3. Blower control...............HI BLOWER
4. Throttles..........................30" Hg.
5.Blower control..............LOW BLOWER
Watch the manifold pressure. A drop in manifold
pressure indicates correct clutch operation.
At low altitudes there will be little gained
by using High Blower. As the impeller is en-
gine-driven, it takes more power to drive it in
High Blower than you gain in shifting. Use High
Blower in climbing and at higher altitudes only.
FUEL SYSTEM
1. Fuel Tanks: The DC-3 has four
center-section tanks, two on each side of the fuse-
lage. Main tanks are forward; each has a capacity
of 202 U.S. gallons. Auxiliary tanks are aft of the
main tanks; each has a capacity of 200 U.S. gal-
lons. Each tank is independent of the others.
The tanks are gauged and indicated by a
four-way selector gauge on the main instrument
panel.
2. Fuel selector valves: On each side of the pedes-
tal is a fuel selector valve. The right valve controls
flow to the right engine, the left to the left engine.
Valves read: LEFT MAIN,RIGHT MAIN,LEFT
AUX.,RIGHT AUX. AND OFF.
Select fuel for either engine
by turning the selector valves to
the desired position.
3. Crossfeed or Booster Pumps
Some earlier DC-3s are fitted with a fuel
crossfeed system that permits either fuel pump
to supply both engines. In this simulation, the
Cross-Feed system is inop and the lever should
be left in the OFF position.
Later DC-3s and converted earlier ones
have booster pumps fitted. The switches for these
are on the upper right panel. These pumps main-
tain fuel pressure if an engine pump fails. For
normal operations turn them on below 1000 feet
and above 10,000 feet.
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