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Radar Altimeter Aerial Unit

Technical Information

Catalogue No: C1667
Category: Flight Control
Object Type: Sensor/Transducer
Object Name: Radar Altimeter Aerial Unit
Part No: 612/1/41910
Serial No: 1054
Manufacturer: Plessey
Division: Unknown
Year of Manufacture: Unknown
Dimensions: Width (mm): 253
Height (mm): 110
Depth (mm): 130
Weight (g): 2,390
Location: Rack RAA01 [Main Store]

Radar Altimeter
612/1/41910 Mod 06
Serial No. 1054
Plessey Avionics & Communications
[hand written on case]
GWH21139 Re-Iss.2
DHL 280 plus 55029, 55030


Radar Altimeter Transmitter/Receiver. Unknown application and history. Possible for rotary wing.

Little is known about this unit but it is assumed that the transmit and receive aerials are behind the two "windows" on the unit and that the unit is mounted under the aircraft with these two windows facing downwards.

Since there are no apparent radio-frequency (RF) connections to this unit, it is further assumed that all the RF circuitry and signal processing is contained within the unit and the cables convey power input and altitude output signals.

The given size exclude the two 440mm long cables.

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