WHAT THE HAMMER, WHAT THE CHAIN

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See, that’s what the app is perfect for.

Sounds perfect Wahhhh, I don’t wanna
onceuponatown
onceuponatown:
“ Pre-World War 2 photograph of Japanese Emperor Hirohito inspecting an array of acoustic aircraft locators (War Tubas) mounted on 4-wheel carriages, taken in the 1930s.
Prior to the development of radar in World War 2, military air...
onceuponatown

Pre-World War 2 photograph of Japanese Emperor Hirohito inspecting an array of acoustic aircraft locators (War Tubas) mounted on 4-wheel carriages, taken in the 1930s.

Prior to the development of radar in World War 2, military air defence forces used these devices to locate approaching enemy aircraft by listening for the sound of their engines. Each locator consists of two pairs of horn detectors, one pair on a horizontal axis and one pair on a vertical axis. The output of each pair is attached by rubber hoses to a stethoscope-type headphone worn by a technician. By using their stereophonic hearing and rotating the horn axis until the aircraft noise sounds “centered” in the earphones, the bearing and elevation of the aircraft can be determined.