June 1942. "John Sonesen, propeller grinder at a Hartford, Connecticut, plant, inspects a blade for a vertical balance during the operation of grinding it to correct contours in a template. This Hamilton blade will be assembled in a pitch-controlling Hydra-Matic mechanism to help power one of our new warplanes." Photo by Andreas Feininger for the Office of War Information. View full size.
  BUY PRINT    June 1942. "John Sonesen, propeller grinder at a Hartford, Connecticut, plant, inspects a blade for a vertical balance during the operation of grinding it to correct contours in a template. This Hamilton blade will be assembled in a pitch-controlling Hydra-Matic mechanism to help power one of our new warplanes." Photo by Andreas Feininger for the Office of War Information. | Click image for Comments. | Home | Browse All Photos