My Friend bought a property out near Greater Pittsburgh Airport but on far edge of property sits a mysterious small red brick building with signs warning FAA property .
But what did it do ? Its obviously much older than airport which was originally built in 1952 .
https://en.wikipedia.org/wiki/Pittsburgh_International_Airport
well one thing lead to another and old memory of mine from Baldwin Boro has discovered it was part of an early aerial beacon system that guided airplanes to airports im talking the old Original Allegheny county Airport in W. Mifflin
https://en.wikipedia.org/wiki/Allegheny_County_Airport
My childhood memories of 60s i remembered a strange field of antennas and a green buildings in Baldwin Boro off Streets Run Road which is now housing . site was similar to image below
It then when all this started coming together along with large arrows on tops of old buildings
Before modern Radar and GPS Radio Beacons where used to direct planes as well as arrows on tops of buildings and on ground.
https://www.airandspace.si.edu/stories/editorial/guiding-light-airway-beacon-tower
