Accession Number : ADD013702

Title :   Portable Glide Slope Indicator.

Descriptive Note : Patent, Filed 29 Jan 86, patented 17 Nov 87,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Task, Harry L ; Wyatt, Ivan S

Report Date : 17 Nov 1987

Pagination or Media Count : 6

Abstract : An improved glide slope indicator system for facilitating aircraft landings under adverse lighting conditions on remote or austere landing sites is provided which comprises a pair of indicators deployable near ground level on each side of a runway, each indicator including a housing having an optical window and a pair of light sources mounted in predetermined spaced relationship to each other and to the optical window and connected to a power source and related circuitry to project a well defined first blinking and second steady light beam of predetermined angular divergence and overlap, one indicator disposed to project beams with an overlap elevated at a first angle relative to horizontal and the other indicator disposed to project beams with an overlap elevated at a second angle relative to horizontal different from the first, with a preselected glide path lying between the two overlaps. An infrared filter may be included in each indicator to project beams observable only with infrared sensitive viewing aids. The system may be battery powered for portability.

Descriptors :   *GLIDE PATH SYSTEMS, *INDICATORS, *LIGHT SOURCES, *OPTICAL EQUIPMENT, *PATENTS, ADVERSE CONDITIONS, AIRCRAFT LANDINGS, ANGLES, CIRCUITS, GLIDE SLOPE, ILLUMINATION, INFRARED FILTERS, INFRARED RADIATION, LANDING FIELDS, LIGHT, OVERLAP, PORTABLE EQUIPMENT, POWER SUPPLIES, RUNWAYS, SENSITIVITY, STEADY STATE, VIEWERS, WINDOWS, FORWARD AREAS, FIELD EQUIPMENT

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE