BMS F-16C/D 4.34, Flight Manual

Page: 108 / 234

T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 108
The FPM is an invaluable cue when flying the aircraft. It represents your instantaneous flight path
vector and is not affected by AOA. It is represented by an aircraft viewed from behind symbol.
The FPM can drift according to the wind and may be pushed by it outside the HUD FOV. In this case a
cross is superimposed on the FPM to indicate that it is not to be used.
The wind drift can be cancelled out with the DRIFT C/O switch on the ICP. The FPM is then anchored
in the middle of the pitch scale bars.
Near the top of the HUD you will find the Gun Cross or Boresight Cross which represents the fuselage
reference line. It displays zero degree azimuth in all modes. It is therefore a very important HUD cue.
The Roll indicator is located on the bottom of the HUD. Each tick mark represents 10° of roll except
the last ones which are set at 45°. The roll indicator is not displayed when the DED/PFL is displayed,
when the pitch bars are de-cluttered or if the INS data is invalid.
Vertical velocity scale (VV/VAH)
Moving the top left switch of the HUD CNTL
panel to VV/VAH displays the Vertical Velocity,
Velocity, Altitude and Heading on the HUD.
The vertical velocity is placed inboard of the
altitude tape. The VV scale features 500 feet
interval marks and a moveable triangular caret
displaying the actual vertical velocity (the same
as the VVI).
When the vertical velocity is displayed the roll indicator usually
found on the bottom of the HUD is replaced by a smaller roll
indicator located just above the FPM.
When the switch is placed to VAH the HUD displays Velocity,
Altitude and Heading information only. This is the default display
of the HUD
Placing the switch to OFF turns off display of the HUD scales.
The current values for velocity and altitude are then displayed in boxes. Heading is not displayed.
Altimeter scales (ALT)
There are three possibilities for the altimeter scale according
to the position of the corresponding switch on the HUD panel:
RADAR, BAROmetric or AUTO.
The default setting is BARO which displays barometric altitude
changing with local altimeter setting. It displays altitude in
hundredths of feet with 100 feet marks (20 feet marks when
the gear is down).The radar altitude (CARA) is also displayed below the
altitude scale in a boxed window with the letter R in front of it if the CARA is
active and within operating limits.