Lockheed L-1649A Starliner

- Carburetor Air Heating Switches
These switches have three positions OFF, COLD and HOT. Position
HOT is spring-loaded to OFF. HOT actuates a rotary valve
in the carburetor air intake scoop permitting hot air from behind the cylinders
to enter the carburetor, while COLD supplies unheated air to the
carburetor. Moving the switch to OFF is stopping the valve in any
intermediate position.
See Carburetor Air Temperature Indicators (27) on the
Flight Engineer's Panel.
[FS: COLD: heating is turned off. HOT: spring-loaded to OFF,
carburetor air heating is turned on. OFF: heating remains off if switch
was in position COLD before and remains turned on if switch comes from
HOT. Between switch 2 and 3 is a hot spot for operating all switches together.]
- Cowl Flap Switches
Refer to Checklist for details on
cowl flap operation to control CHT (see also (38) on the
Flight Engineer's Panel).
[FS: Between switch 2 and 3 is a hot spot for operating all cowl flaps together.]
- Sync Master Engine Selector Switch
Selects either engine #1 or #2 as master propeller for the
automatic Synchronizer Button (4). See also (47), (48) on the
Flight Engineer's Panel.
[FS: In position OFF, the default FS propeller synchronization will be
activ if (4) is set ON].
- Synchronizer Button
This button toggles the automatic propeller synchronization. The position of
switch (3) determines, which engine is used as master propeller.
[FS: If the Sync Master Engine Selector Switch (3) is in position OFF, the
default FS propeller synchronization will be activated with this button].
See also (47), (48) on the
Flight Engineer's Panel.
Propeller synchronization is used for cabin noise reduction in almost all stages
of flight (turn off while taxiing when using the engines for steering).
Propellers may be synchronized manually by hand using the
Propeller Governor switches (7) (1/100 steps), but the automatic system is working
more accurate (1/1000 steps). Like on the real aircraft, the automatic synchronizer only
works, if pitch deviation is less than ±3%.
- Synchronizer Off Indicator
Control lamp for (4).
- Spark Control Switch
Setting this switch to RETARD turns off the automatic spark advance.
[FS: Click to open the protection cover. Then, each click toggles the switch ON/OFF. The
cover closes automatically after some time.]
Position RETARD is needed for engine start and above 2500 RPM (2400 RPM
with HIGH BLOWER).
For more details, refer to Performance Tables.
[FS: If aircraft is not fitted with automatic spark advance (ie. models 049A, 749A),
the switch is deactivated and does not toggle any function, especially it's not needed
for a successful engine start. Therefore, the explanations only apply to versions with
Spark Control.]
- Propeller Governor Switches
While all four propellers are affected by the Propeller Master Lever (55) on the
Flight Engineer's Panel, these switches allow
individual governor setting throughout the governing range (FULL DECREASED to
FULL INCREASED) for each engine.
Switches are spring-loaded to OFF, and holding the switch in either the
INC RPM or DEC RPM position provides electrical power to the propeller
governor to effect changes in pitch.
Propeller cannot be feathered or unfeathered with the Governor Switches, instead
use Feathering Buttons (8).
[FS: Switches are increasing or decreasing an offset (positive or negative) which is
added to the position of the Propeller Master Lever. Each time the
Propeller Master Lever is moved, these offsets are resetted to zero].
- Feathering Buttons
Neither the Propeller Master Lever (55) on the
Flight Engineer's Panel
nor the Propeller Governor Switches (7) allow to feather or unfeather. Manual
feathering is done by pushing the Feathering Button of the desired engine.
Pulling the button causes the propeller to unfeather and its pitch is resetted to
the position determined by the Propeller Master Lever.