User manual

DodoSim 206 FSX User Manual
Copyright© 2009 DodoSim. All Rights Reserved.
Page 23
4. GPS/Nav switch - This switch determines which navigational system drives the direction
indicator gauge; either the Nav 1 radio, or the GPS device.
5. Fuel Valve - This electrical switch causes a solenoid to open the fuel valve and allow fuel
to reach the engine. Note that this switch “fails safe”; i.e. If electrical power is lost the fuel
valve remains open and fuel continues to flow to the engine.
6. Panel/Function shortcuts - Clicking with the mouse on any of the bottom six short-cut icons
causes the respective panel to toggle on or off. From clockwise these are: overhead
panel, back-up compass, centre pedestal, collective lever, GPS and check-lists.
The icon visible in the image that looks like a wrench is a short cut to open the service
dialog window and performs the same function as the “Service helicopter” menu item.
Note that this is only click-able when the helicopter is on the ground and the engine and
rotors are not turning. Attempting to click on it at any other time will cause a red cross to be
displayed upon it and the service dialog will not open.
Important note:
Servicing options are not available whilst the aircraft is configured for
“Timed Failures”, but only when set for “Cumulative Wear” mode. (See “Wear and Failures”
section later for full details.)
The faint icon next to the wrench, with a ‘T’ in it is an indication for when “Trainer Mode” is
active. The icon flashes during a Trainer Mode start-up or shut-down procedure. Clicking
the icon while it is flashing will cause the Trainer Mode sequence to cease. (See Trainer
Mode section later for full details.)
3.3.3.2 The Centre Pedestal
Located immediately below the front panel, the centre pedestal houses the aircraft’s radio stack
and controls for three supplemental aircraft systems;
1. Annunciator brightness control – This toggles the brightness of the front panel’s
annunciator, (caution and warning lights), between a bright and dim setting. Note that it is
only possible to dim the annunciator lights when the instrument lights switch, (on the
overhead panel), is on in order to preserve daytime readability.
2. Engine anti-icing control - For use in cold and wet atmospheric conditions when icing may
potentially form on the engine inlets, restricting airflow and risking a failure, the anti-icing
system bleeds hot air from the engine’s compressor stage for warming the inlets. Note
that this system is intended to prevent icing from occurring, not remove it. Note that
engine performance suffers slightly, especially at high pressure altitudes (> 5000’ MSL)
when anti-icing is in use. (This can be observed on the Exhaust Gas Temperature (EGT)
and Torque (TQ) gauges on the front panel.)
3. Hydraulics switch, (sometimes called “Control Boost”.) - To relieve the pilot's physical
effort, the cyclic and collective levers are assisted by hydraulic servos, driven by an oil
pump in the accessory gearbox connected to the engine output shaft. Without this feature,
control is sluggish and slow to respond, requiring considerable effort. This switch is
provided so that in the event of a hydraulic failure the system can be disabled, allowing the
pilot to land the helicopter without fear of the hydraulic assistance returning, should the
fault be intermittent, and risk crashing the helicopter due to sudden, unanticipated over-
control.
Pilot Information: Note that this switch “fails safe”; i.e. if electrical power is lost, the switch
defaults to an “on” state. Hydraulics can only be disabled by selecting off whilst electrical
power is present. i.e. Either the engine must be running and the generator enabled, or