The photograph depicts a fan "y" with a clutch, which is part of the radio apparatus used for airplanes during World War One. The photo was taken at the Radio Development Station in Washington, This image is not intended for publication. Date of the photo is April 29, 1918, with reference number 111-SC-9117.

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Size: 9177px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: .., 111-sc-9117, 2, 3, 29, 1918, activities, airplane, american, apparatus, april, clutch, corp., development, fan, klein, military, photographer, photographs, photography, radio, red, station, surect, war, washington, world