Radio Equipment, Transmitters Aircraft radio telephony transmitter (transmetteur radio telephonique ou radiotelephonique ou radio-telephonique), 1915

Radio Equipment, Transmitters Aircraft radio telephony transmitter (transmetteur radio telephonique ou radiotelephonique ou radio-telephonique), 1915. A radio telephony transmitter for use with aircraft, with a round valve and microphone. World War I saw the first attempts at installing radio communication equipment on aircraft, as the advantages of ground to air communication as well as between aircraft were obvious. Observation aircraft could direct the aim of artillery, as well as reporting enemy troop movements. Previously the only means of communication between pilots and with the groundæ involved hand signals and flags. ©SSPL/Science Museum