Optional Equipment
RDR 1400C Weather Radar
CSP
−
902RFM207E
−
1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
Original
10
−
66
FAA Approved
Reissue 2
PART V
PERFORMANCE DATA
No change.
PART VII
SYSTEM DESCRIPTION
RDR-1400C interface with EFIS 40 or EFIS 50:
The Telephonics Weather Radar RDR1400C is an integrated system, interfacing
with the LITEF LCR 92S AHRS and the Honeywell EFIS 40 installed by the
Honeywell (formerly Allied Signal, Inc.) IFR STC SR00436WI-D, or the
Honeywell EFIS 50 installed by the Heli-Dyne STC SR09151RC.
The Telephonics Weather Radar system consists of 5 flight-line replaceable units:
Receiver-Transmitter RT-1401B
Control Panel CP-113
Navigation Concentrator NC-104B
Radar Antenna Drive unit DA-1203A
Antenna Array AA-4510A
The Receiver-Transmitter (R/T)
is installed in the nose of the MD900. The
R/T provides pulsed X-band output signal to the sector-scanning antenna. The
reflected signal is amplified by the receiver, digitized and then routed to the
Navigation Concentrator for conversion to ARINC 453 data for the EFIS Symbol
Generators. Operating parameters permit optimum performance in each of the
five operational modes: 3 search, weather, and beacon modes
The Radar Control Panel
is located in the center console. All of the WX system
controls except for display range are located on this control panel. Mode selections,
Antenna Tilt, Search gain, BCN gain, and Scan are available for selection. The
Antenna Tilt and Roll adjustment screws are also located on this panel.
The Navigation Concentrator (NC)
is installed in the nose, just above the
R/T. It provides interface capabilities to convert WX R/T data into ARINC 453
format required by the EFIS Symbol Generator. The Nav Concentrator receives
low speed ARINC 429 data from the EFIS containing the range selected and
converts this into usable information for the R/T. The NC also receives low speed
ARINC 429 data from the Control Panel converting it into mode and control
commands for the R/T. Lastly, the NC converts 429 attitude information from
the AHRS for the R/T.
The Radar Antenna Assembly
consists of a drive unit and a 10 inch array.
The motor driven drive unit positions the array in azimuth and elevation axis.
Scans are performed in 90 degree sectors. Stabilization is in accordance with
pitch and roll signals from aircraft AHRS as converted by the NC-104B. Tilt
is selectable for +/- 15 degrees from horizontal from the Control panel. The 10
inch array has a range of 185NM.
Summary of Contents for MD900 Explorer
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