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Microsoft Flight Simulator DOUGLAS DC-3 User Manual

Microsoft Flight Simulator DOUGLAS DC-3
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The DC-3 (with Pratt&Whitney engines)
hascowlapsaroundeachengine,directlybehind
the engine cowling. They control engine tempera-
turebyregulatingairowthroughthecowling.
Cowl ap controls are on the right side
of the copilot’s seat. They are marked: CLOSED,
OFF, TRAIL, OFF, OPEN. Operate by moving
them using the serrated knob atop each control,
clockwise or anti-clockwise.
WhensettoTRAIL,theapswillopen
and close automatically with airspeed and air
pressure through the cowlings.
IMPORTANT!
For all ground operation, the controls
MUST be set to OPEN. This maximises the air
passing through the engine cowlings and prevents
over-heating.
In icy and very cold conditions, you can
select CLOSE to assist with engine warming but
watch the cylinder head temperature gauge for
anysignsof overheatandOPENthecowlaps
immediately.
CLOSED POSITION; In this position
theapsareclosedandlayatagainstthebody
of the engine cowling.
TRAIL POSITION; In this position, the aps
takeup an angle dependent on airow through
thecowling.Thefastertheairow,theatterthe
apswilllay.Slowspeedswillopentheapsto
aid engine cooling. This all happens automatically.
OPEN POSITION; In this position the
apsarefullyopenandremainsountil
another selection is made. ALWAYS use this
position when engines are running on the ground.
COWL FLAPS CONTROLS
24
As soon as all instruments and gauges
indicate within safe operating limits, obtain taxi
clearance from the Tower and taxi to run-up area.
Remember, the DC-3 is a large, heavy
airplane. Although you taxi like any other 2-en-
gined airplane with conventional landing gear, its
size and weight tend to exaggerate its movement
in the air and on the ground. You will soon learn
its characteristics but until you know the airplane
well, handle it with extreme care.
In straight taxiing, keep the tailwheel
locked and use throttles as evenly as possible.
In cross-wind taxiing, a locked tailwheel
and correct use of throttles help you maintain
direction with minimum use of brakes. When
you are taxiing cross-wind, use additional power
in the upwind engine.
Anticipate your turns. Momentum gath-
ered in straight taxiing is much greater than in a
lighter airplane and carries you into turns. Before
your turn, slow your airplane down and unlock
your tailwheel. In starting or completing turns,
use throttles in co-ordination with your brakes.
If you use throttles properly, you take a great
load off your brakes and thereby increase their
life.
Remember you have differential braking
in the DC-3. But do not rely entirely on it, use
throttle control instead. It is kinder on landing
gear!
Normally you make your engine run-
upinanareajustclearof therunway.If trafc
permits and you are cleared for takeoff, you can
make your run-up on the runway.
The less you idle your engines between
run-up and takeoff the better. If there is a delay
between run-up and takeoff, keep the engines
running at a minimum of 1000 rpm to prevent
plug fouling. At the same time, watch cylinder
head temperatures to prevent overheating.
Once in position, make your checks:
Parking Brake..........On
Tailwheel...........Locked
Fuel Booster Pumps.......OFF
Mixtures...........Auto Rich
Cowl Flaps.........OPEN
Fuel Selectors.........Main Tanks
Propellers .............MAX RPM
Carburettor Heat.....COLD
Generators...........Check Ammeters
Advance throttles until RPM reaches
1500. Move propeller controls to MIN RPM. This
operationchecksgovernoroperationandushes
the prop dome with warm, clean oil.
Ignition
Increase one throttle at a time until manifold
pressure indicates 30” Hg. Check magnetos by
turning the requisite engine magneto switch from
BOTH to RIGHT and back. There should be a
small drop (no more than 100rpm) in revs. Imme-
diately return the control to BOTH. Do the same
for the other engine.
Hydraulic Pumps
Checkbyusingtheapscontrolleverandselect-
ingDOWN.If alliscorrect,returntheapsse-
lector to the NEUTRAL position.
Check all instruments for each engine before re-
tarding throttles.
TAXYING
ENGINE RUN-UP
23

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Microsoft Flight Simulator DOUGLAS DC-3 Specifications

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BrandMicrosoft
ModelFlight Simulator DOUGLAS DC-3
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LanguageEnglish