Accession Number : AD0674631

Title :   DEVELOPMENT OF AN EXPERIMENTAL AIRCRAFT HYGROMETER.

Descriptive Note : Final rept. 15 Jul 65-15 Aug 67,

Corporate Author : HONEYWELL INC ST PAUL MINN SYSTEMS AND RESEARCH DIV

Personal Author(s) : Koehler,Lyle ; Ballinger,John G.

Report Date : OCT 1967

Pagination or Media Count : 58

Abstract : Two experimental aircraft hygrometers using dry-ice heat sinks were designed and constructed, both units recorded frost points below -80C when flight tested at altitudes to 65,000 feet aboard a U-2 aircraft. A third hygrometer which requires no chemical heat sink was also designed, built and laboratory tested. In addition, a heat-transfer analysis was conducted to allow predictions of the instrument's capability as a function of altitude, free-air temperature and Mach number. This report describes the instruments and presents analytical and experimental results of the program. (Author)

Descriptors :   (*AIRCRAFT EQUIPMENT, *HYGROMETERS), METEOROLOGICAL PHENOMENA, DEW POINT, INSTRUMENTATION, HEAT SINKS, CARBON DIOXIDE, THERMOELECTRICITY, REFRIGERATION SYSTEMS, HEAT TRANSFER, PRESSURE, FLIGHT TESTING, TABLES(DATA), UTILITY AIRCRAFT

Subject Categories : Flight Control and Instrumentation
      Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE