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During World War I, some pilots had radios with them as they flew to communicate with the ground. The need for Air Mail Service pilots to be in contact with landing fields was considered important, but after trials through 1922, radio tests were set aside for lack of funding until 1925.

Click here to learn more about the Radio.

Radio setup in DH4  
  Radio telegraph at a 1925 Airway Radio Station
Click on the photos to view a larger image.

(top left) Radio setup in DH4

(bottom right) Radio telegraph at a 1925 Airway Radio Station
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