RA-4000/4500 & FRA-5500 RADAR ALTIMETERS

NMS-01S

Radar Altimeters

FreeFlight Systems modern radar altimeters are backed by more than 50 years of experience, and have a proven track record as a reliable solution inthe most challenging and critical segments of flight. The TSO and ETSO-approved systems are extensively deployed worldwide in helicopter fleets, including some of the largest HEMS operations worldwide. Designed for helicopter and seaplane operations, our radar altimeters provide precise AGL information from 2,500 feet to ground level.

Model RA-4000 RA-4500 FRA-5500
TSO-C87 * * *
ETSO-2C87 * * *
DO-160E * * *
DO-178 Level B *
DO-178B Level C * *
RS-485/422 * * *
RS-232 * * *
ARINC 429 * *

SPECIFICATIONS

  • Frequency : Modulated continuous wave at 4.3 GHz center frequency, 100 MHz sweep at 4.25 to 4.35 GHz
  • Altitude Range : -20 to 2,500 ft.
  • Altitude Accuracy :
    0 to 100 ft. ≤ 3%
    100 to 500 ft. ≤ 3%
    500 to 2,500 ft. ≤ 5%
  • Update Rate : 25 times per second
  • Self-Test : Power-on self-test and recurring built-in test
  • Antennas : Dual; response angles up to ±20° pitch, ±30° roll
  • Service Ceiling : 50,000 ft.

PHYSICAL CHARACTERISTICS

  • Size : 3.1” H x 3.0” W x 6.8” D
  • Weight : Unit: 1.9 lbs
  • Antennas (2) : 0.37 lbs
  • Power Requirements : 20-36 VDC, 0.4 A max at 28 VDC
  • Operating Temperature : -55°C to +70°C