Accession Number : AD0714638

Title :   Flight Evaluation AN/APN 191 Radar Altimeter.

Descriptive Note : Final rept. Feb 68-Jul 70,

Corporate Author : ARMY AVIATION SYSTEMS TEST ACTIVITY EDWARDS AFB CALIF

Personal Author(s) : Bender,Gary L. ; Burden,John R.

Report Date : SEP 1970

Pagination or Media Count : 29

Abstract : A flight evaluation of the AN/APN 191 radar altimeter was conducted to determine its accuracy and suitability as a test instrument. The testing consisted of 9.7 flight hours with the altimeter system installed in a UH-1C helicopter. Results show that the AN/APN 191 altimeter system has a large random error and is not as accurate as present altitude determination methods. Therefore, this altimeter is unsatisfactory as a test instrument. The indicator scale and sensitivity were excellent; and the accuracy was not affected by attitude, vertical speed, or airspeed variations. (Author)

Descriptors :   (*RADIO ALTIMETERS, FLIGHT TESTING), RELIABILITY(ELECTRONICS), PERFORMANCE(ENGINEERING), ACCURACY, RADAR EQUIPMENT

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE