Beechcraft C-12C Operator And Technical Reference Manual page 404

TM 1-1510-218-10
Once go-around is selected, any roll mode can
be selected. The wings level roll command will cancel.
The go-around mode is canceled by selecting another
pitch mode or TCS.
(12) TACAN Mode.
selected by selecting the radio position with the NAV
source selector on the EFIS control panel and either
VOR 1 or VOR 2 selected by the CRS 1/2 switch to a
valid TACAN frequency. TACAN distance information
will be displayed on the EHSI.
The NAV/TAC receiver must be tuned to a
valid TACAN frequency.
1. Pitch Thumbwheel
2. Bank Limit Switch
3. Soft Ride Switch
MODE
Yaw Damper Yaw Control
A/P Engage
Basic Touch Control
A/P Steering TCS
Turn Knob
Pitch Wheel
Heading Hold
3C-50
The TACAN mode is
NOTE
Figure 3C-21. Autopilot Controller
Table 3C-12. Operating Parameters (Continued)
CONTROL OR
SENSOR
Engage Limit
Engage Limit
Roll Control Limit
Pitch Control Limit
Roll Angle Limit
Roll Rate Limit
Pitch Angle Limit
Roll Angle Limit
TACAN functions are identical to VOR using TACAN
information rather than VOR signals. The ARM / CAP
annunciation is the same as in VOR mode.
(13) TACAN Approach Mode.
approach mode is the same as a VOR approach
mode, except that it uses a TACAN in place of a VOR
station.
g. Autopilot
controller provides the means of engaging the
autopilot and yaw damper, as well as manually
controlling the autopilot through the turn knob and
pitch wheel. Refer to Figure 3C-21. The autopilot
system limits are listed in Table 3C-12.
4. Turn Knob
5. YD Engage Switch
6. AP Engage Switch
PARAMETER
Unlimited
Roll Up to ± 90°
Pitch Up to ± 30°
Up to ± 45° Roll
Up to ± 20° Pitch
± 30°
± 15°/sec
± 15° Pitch
Less than 6° and no roll mode
selected
The TACAN
Controller. The
VALUE
autopilot