Visual runway indexing system

Details Visual runway indexing system Visual runway indexing system

1974-04-15

1976-10-05

Blix, Trygve M.

Aeronautics and astronautics

Landing field arrangement

40130R, 40217, 240 12, 340 26, B64F 118

Patent

active

039840697

ABSTRACT:
Runway distances are disclosed on sides of translucent truncated pyramids mounted on spaced runway lights. The pyramids have flat tops and two translucent sloped sides with large numerals which face the runway at 120.degree. angles. A rear face has a port with the hinged door for installation and maintenance access. A flat bottom with a central hole completes the pyramid. Sides and bottom are joined by inner and outer riveted angular channels. Anchor plates cover inner corners of the channels. The pyramids are mounted at thousand foot intervals. Cross bars are painted across the runway between opposite pyramids to promote pilots' perception of the indexed distances. Diffusers in the pyramids wash light evenly over the translucent faces for enhanced visibility. Transformers within the pyramids step up voltage to brighten runway lights.

REFERENCES:
patent: 1034211 (1912-07-01), DePalma
patent: 1643585 (1927-09-01), Pitou
patent: 1725244 (1929-08-01), Bareham
patent: 1776111 (1930-09-01), Donaldson
patent: 2344639 (1944-03-01), Ressinger
patent: 2404933 (1946-07-01), Stockstrom
patent: 3157374 (1964-11-01), Conrey
patent: 3233352 (1966-02-01), Projector et al.
patent: 3587184 (1971-06-01), Walker

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