BMS F-16C/D 4.34, Flight Manual

Page: 144 / 234

T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 144
1.14.3. Heading Select (ROLL)
Placing the left ROLL switch to HDG SEL will turn the aircraft towards the heading selected in the HSI
through the heading bug. The heading bug is visible on the picture as white
captain’s bars on the HSI
compass rose. It is set to 360° in the picture. You can rotate
the heading bug by using the HDG knob at the bottom left of
the instrument. Two key callbacks are useable: increment by
1° or by 5° if you use the keyboard, joystick programming or
even encoders. It can also be done with the mouse wheel for
rapid increment (this mouse behaviour is valid for all cockpit
knobs (encoders)).
In this mode the FLCS limits bank angle to 45°. Stick
steering remains possible but the A/P will resume following
the HSI heading bug as soon as the stick is released. The
paddle switch has no effect in this mode as the paddle switch
cannot change the HSI heading bug and this is the sole
signal that is valid for Heading Select mode.
1.14.4. Attitude Hold (ROLL)
Placing the left ROLL switch to ATT HOLD commands the aircraft to maintain the current roll attitude.
Angles above or below 60° in roll will not be captured. Stick steering and paddle override remains
available with the known restriction of each mode.
1.14.5. Steering Select (ROLL)
Placing the left ROLL switch to STRG SEL commands the aircraft to fly to the current steerpoint of
interest. As in Heading Select mode the bank angle will be limited to 45°. If AUTO steerpoint is
selected in the UFC the A/P will steer to the next waypoint when reaching the vicinity of the current
steerpoint (it follows the steerpoint of interest which in AUTO is automatically switched to the next
waypoint). If MANUAL is set the A/P will circle the steerpoint at a 30° bank angle. Stick steering
remains useable but paddle override has no effect since the paddle is not able to change the
steerpoint of interest.
1.14.6. Autopilot limits
In all modes the autopilot will refuse to engage or will automatically disengage if one of the following
conditions is met:
•
Gear is down
•
AR door is open
•
ALT Flaps switch is in EXTEND
•
AOA greater than 15°
•
DBU is engaged
•
MPO switch is held in OVRD
•
A/P failure or FLCS failure PFL message (thus STANDBY gains will be active as well)
•
TRIM A/P DISC switch is placed in DISC
•
Stall Horn is active
The Autopilot has a final mode beside the ones set by the roll and pitch switches: the TFR.
See the MFD chapter for further information about the TFR.