RA 4500 RADAR Altimeter
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RA-4500 Radar Altimeter
For critical flight regimes, the new FreeFlight Systems RA-4500 Radar Altimeter (TSO-C87) provides today’s flight crews with dependable, highly accurate and economical above-ground-level (AGL) information. This real-time system enhances operational safety during approaches, nighttime operations, and hazardous flight above rough terrain.

The newest radar altimeter model, the RA-4500 is especially valuable when flying search and rescue missions, forestry operations, pipeline maintenance, off shore helicopter ops, helicopter emergency medical services (HEMS), other aero-medical emergency services, border patrol, and electronic news gathering operations. The RA-4500 Radar Altimeter with its ARINC 429 output can be easily coupled with modern electronic flight information systems (EFIS), flight director systems, and Terrain Awareness and Warning Systems (TAWS).

Proven and precise, the RA-4500 offers improved situational awareness for a broad range of fixed and rotary wing aircraft. Designed for applications such as helicopter and seaplane operations where accuracy is needed down to zero feet, the RA-4500 provide precise AGL information from 2000 feet down to ground level.

Altitude Range: -20 to 2500 ft.
Power: 20 – 36 VDC; 400 mA MAX @ 28 VDC
Environmental: -67°F to +158°F (-55°C to 70°C)
Alt: 50,000 ft. (15,200 m)
Size (HxWxL): 3.06 x 3.15 x 6.78 in. (7.8×8.0x17.2 cm)
Weight: Unit: 1.9 lbs. (0.86 kg)
Ant. (2): 0.37 lbs. (0.17 kg)
Antenna(s): Dual; response angles up to ±20° pitch,±30° roll
Transmitter Power: 100 mW minimum out of transmitter
Frequency: Frequency modulated continuous wave; 4.3-GHz center frequency sweep, 4.25; to 4.35 GHz
Update Rate: 25 times/sec.
Altitude Accuracy: 0 to 100 ft. ±3 ft.; 100 to 500 ft. ±3%; 500 to 2500 ft. ±5%
Display Disable: Strut switch inputs
Self-test: Power-on self test and recurring built-in test
Interface
Inputs: Strut Switch
Outputs: ARINC 429, RS-232C, RS-485/422, Optional ARINC 552 Analog
Certifications
FAA Authorization: TSO-C87 Precision Equipment
EASA Authorization: ETSO-2C87
Environmental: DO-160E
Software: DO-178B, Level C