AN/CRN-2
The radio set AN/CRN-2 was an air transportable glide path transmitter used by the Army Air Force during and after World War II, the set was standardized on 5 February 1944. and was an upgrade of SCR-592.
Use[]
Signals from the transmitter are received by the pilot of the aircraft, over the AN/ARN-5 receiving equipment. which provides visual indication of the proper course of descent in the vertical plane during instrument landing operation. At an altitude of 3,000 feet it provides a straight-line glide path course with good definition from a minimum distance of 15 miles from the point of landing contact with the ground. The angle indicated between the horizontal and the glide path is readily adjustable between 2 and 5 degrees.
- The trailer is located 750 feet from the approach end of the runway, and 400 feet to one side, or the other, of the runway centerline.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/05/ILS_localizer_illustration.svg/300px-ILS_localizer_illustration.svg.png)
Statistics[]
The equipment operates in the frequency range of 329 to 335 Mc. power output is 25 Watts of CW power. the signal is a straight line glide path-double beam MCW Modulated continuous wave system. the range is 15 miles at 3,000 feet.
Components[]
The transmitting components were mounted on an air transportable trailer (the V-1), power is provided by a PE-120 Generator (115 volts) and PP-29 Rectifier. Total weight is 1800 Lbs.
- An SCR-610 is provided for ground communications
Aircraft component[]
The AN/ARN-5 consists of antenna system
- AS-27A (combination) and or antenna system
- AS-61. (glide path only) and radio receiver R-89 or R-57.
See also[]
- AN/MRN-1
- AN/MRN-2
- AN/MRN-3
- Instrument landing system
- List of military electronics of the United States
- List of U.S. Signal Corps vehicles
- LORAN
- Radio navigation
- SCR-277
- SHORAN
- Signal Corps Radio
References[]
- TM 11-227 Signal Communication Directory. dated 10 April 1944
- TM 11-487 Electrical Communication systems Equipment. dated 2 October 1944
- Graphic Survey of Radio and Radar Equipment Used by the Army Airforce. section 3 Radio Navigation Equipment Dated May 1945
Further reading[]
- Erik M. Conway (2006). Blind Landings: Low-Visibility Operations in American Aviation, 1918–1958. JHU Press. p. 108. ISBN 978-0-8018-8449-8.
External links[]
- Military radio systems of the United States
- Military electronics of the United States
- Equipment of the United States Air Force
- World War II American electronics
- Military equipment introduced in the 1940s