Radar And Transponder - Beechcraft C-12C Operator And Technical Reference Manual

wings level and 7q nose up climb
attitude.
Go-around mode can be selected any time
after selecting APPR mode.
2. HDG selector switch – Press, after aircraft
cleanup, go-around power settings, and
airspeed are established.
m. Back-Course Approach.
1. VOR receiver
frequency.
2. COURSE knob – Set front course inbound
runway heading in COURSE window.
3. HDG knob – Set heading marker to
desired intercept angle.
4. HDG selector switch – Press.
that HDG lamp illuminates autopilot/flight
director annunciator panel.
5. B/C selector switch – Press. Observe that
BACK LOC and NAV ARM annunciator
lamps illuminate autopilot/flight director
annunciator panel, indicating that system
is armed for back localizer capture. Any
previously selected vertical mode will
cancel.
3A-28. DESCRIPTION.
The radar and transponder group provides
identification, position, emergency tracking system,
and radar system to locate weather areas.
3A-29. DIGITAL WEATHER RADAR (RDR 2000)
SYSTEM.
a. Description. The RDR 2000 color weather
radar not only displays in-flight weather, but also
permits incorporation of the KGR-358 radar graphics
unit. The color weather radar is used to detect
significant enroute weather formations to preclude
undesirable penetration of heavy weather and its
usually associated turbulence.
system provides a 320 nm display, with a 240 nm
weather avoidance range plus weather penetration
advantages. With the radar graphics unit in the NAV
mode, navigation information is integrated with the
weather display. The phased array antenna (flat
plate), located in the nose of the aircraft, is fully
NOTE
– Tune appropriate
Observe
Section IV. RADAR AND TRANSPONDER
The weather radar
6. NAV CAP annunciator lamp will illuminate
when system has captured back localizer
course.
7. PITCH control – Use to establish and
maintain desired rate of descent.
n. Yaw Damper Operation.
(1) The rudder channel of the autopilot may
be selected separately for yaw damping by pressing
the YAW DAMP switch on the pedestal. The switch
face will illuminate when the yaw damper is engaged.
(2) To disengage the yaw damper, press the
disconnect button on the pilot's or copilot's control
wheel to the first detent or press the YAW DAMP
switch on the pedestal.
(3) Refer to Emergency Procedures for other
means of disconnecting the yaw damper.
o. Disconnecting Autopilot. The autopilot may
be disconnected by any of the following actions.
1. Pressing DISC
located on the outboard horn of either
control wheel to the first detent.
2. Placing the ENG / DIS switch on the
autopilot mode selector panel to the DIS
position.
stabilized to compensate for aircraft pitch and roll. The
antenna provides a full 90° scan angle, ±15° tilt, and a
4-microsecond pulse width in both weather and ground
mapping modes.
Extended Sensitivity
increases the displayed intensity of storms outside the
normal STC range. Extended STC relates the storm
intensity to its distance and assigns a corresponding
color. As a result, the display presents a more
accurate picture of storm intensity.
Weather systems are displayed as 5 colors,
including black, depicting rainfall intensity overlaid with
range rings. Bearing marks at dead ahead and 20° on
either side, aids the pilot in judging the bearing of
storms and necessary heading changes.
With radar graphics interfaced, activate a circle
mode by pressing the page button located on the radar
graphics control panel. Functional operation in this
mode is the same as in the standard display mode and
TM 1-1510-218-10
TRIM/AP YD switch
Time Control (STC)
3A-37