Register | Login


World War One was the first major conflict that saw the use of airplanes. During the early years of the fighting, aircraft were mostly used for surveillance and observation, but as the war progressed, airplanes took on an offensive role. By the end of the war, airplanes had become so deadly that it became necessary for the Allies to develop new tactics for air defense, if the next war was to be won.

The most important ingredient of an effective air defense system is an early warning system that could detect and track enemy aircraft before they arrive. But in the days before radar, the only way to detect enemy aircraft was to listen to the sound of approaching airplanes.

sound-mirrors-denge-4

Photo credit: Paul/Flickr

Read more »
© Amusing Planet, 2016.


Loading...

The Relief Map of Guatemala
The Relief Map of Guatemala
Jap Herron A Novel Mark Twain Wrote After His Death
Jap Herron A Novel Mark Twain Wrote After His Death
Helepolis The Failed War Machine From Which Rose a Wonder of The Ancient World
Helepolis The Failed War Machine From Which Rose a Wonder of The Ancient World
Ffordd Pen Llech The Worlds New Steepest Street
Ffordd Pen Llech The Worlds New Steepest Street
The British Cemetery on American Land
The British Cemetery on American Land
Australias Mouse Plagues
Australias Mouse Plagues
Tempest Prognosticator Predicting Storms With Leeches
Tempest Prognosticator Predicting Storms With Leeches
Memorial to The First Icelandic Glacier Lost to Climate Change
Memorial to The First Icelandic Glacier Lost to Climate Change