Accession Number : AD0700096

Title :   AIRCRAFT HYGROMETER FLIGHT TEST.

Descriptive Note : Final rept. 8 Aug 67-31 Oct 69,

Corporate Author : HONEYWELL INC ST PAUL MINN RESEARCH DEPT

Personal Author(s) : Koehler,Lyle E.

Report Date : 15 NOV 1969

Pagination or Media Count : 91

Abstract : Two series of flight tests of the Honeywell Alpha-Radiation Hygrometer were conducted on an Air Weather Service WC-135. These tests were made to determine the hygrometer's operational capability on high-speed, high-altitude weather-reconnaissance aircraft. Both sensors tracked frost points as low as -80C and had sufficient depression capability to measure relative humidities below 2 percent at 30,000 feet with a 450-knot airspeed. The hygrometer was capable of measuring all humidity conditions encountered except when icing conditions blocked the air-sampling probe. (Author)

Descriptors :   (*WATER VAPOR, MEASUREMENT), (*HYGROMETERS, FLIGHT TESTING), DESIGN, OPERATION, HUMIDITY, DEW POINT, RECONNAISSANCE AIRCRAFT

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE